diff --git a/gleam.toml b/gleam.toml
index feb1fcf..f3e2b93 100644
--- a/gleam.toml
+++ b/gleam.toml
@@ -15,7 +15,7 @@ target = "javascript"
 
 [dependencies]
 gleam_stdlib = ">= 0.36.0 and < 2.0.0"
-p5js_gleam = ">= 2.1.0 and < 3.0.0"
+p5js_gleam = ">= 2.1.1 and < 3.0.0"
 prng = ">= 3.0.2 and < 4.0.0"
 gleam_community_maths = ">= 1.1.0 and < 2.0.0"
 
diff --git a/manifest.toml b/manifest.toml
index 8f5dfec..9897fc7 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -16,7 +16,7 @@ packages = [
   { name = "gleam_json", version = "1.0.0", build_tools = ["gleam"], requirements = ["gleam_stdlib", "thoas"], otp_app = "gleam_json", source = "hex", outer_checksum = "8B197DD5D578EA6AC2C0D4BDC634C71A5BCA8E7DB5F47091C263ECB411A60DF3" },
   { name = "gleam_stdlib", version = "0.37.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "5398BD6C2ABA17338F676F42F404B9B7BABE1C8DC7380031ACB05BBE1BCF3742" },
   { name = "glint", version = "0.18.1", build_tools = ["gleam"], requirements = ["gleam_community_ansi", "gleam_community_colour", "gleam_stdlib", "snag"], otp_app = "glint", source = "hex", outer_checksum = "5FB54D7732B4105E4AF4D89A7EE6D5E8CF33DA13A3575D0C6ECE470B97958454" },
-  { name = "p5js_gleam", version = "2.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "p5js_gleam", source = "hex", outer_checksum = "239AB03FB21F8CA929AE8E0C246AAF37D316AC1E6431470F17033C9483AF336D" },
+  { name = "p5js_gleam", version = "2.1.1", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "p5js_gleam", source = "hex", outer_checksum = "4EEC8FCD162486FCAA2AFEC9E8B7A8843AC9935551CF2B2A604A0F070AB6B00F" },
   { name = "prng", version = "3.0.2", build_tools = ["gleam"], requirements = ["gleam_bitwise", "gleam_stdlib"], otp_app = "prng", source = "hex", outer_checksum = "C61B103F9AF5031ADAA35187CCE7130845EF5088D88FD084E5995D4FBEC9D745" },
   { name = "ranger", version = "1.2.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "ranger", source = "hex", outer_checksum = "1566C272B1D141B3BBA38B25CB761EF56E312E79EC0E2DFD4D3C19FB0CC1F98C" },
   { name = "simplifile", version = "1.7.0", build_tools = ["gleam"], requirements = ["filepath", "gleam_stdlib"], otp_app = "simplifile", source = "hex", outer_checksum = "1D5DFA3A2F9319EC85825F6ED88B8E449F381B0D55A62F5E61424E748E7DDEB0" },
@@ -30,6 +30,6 @@ packages = [
 esgleam = { version = ">= 0.6.0 and < 1.0.0" }
 gleam_community_maths = { version = ">= 1.1.0 and < 2.0.0" }
 gleam_stdlib = { version = ">= 0.36.0 and < 2.0.0" }
-p5js_gleam = { version = ">= 2.1.0 and < 3.0.0"}
+p5js_gleam = { version = ">= 2.1.1 and < 3.0.0"}
 prng = { version = ">= 3.0.2 and < 4.0.0" }
 startest = { version = ">= 0.2.0 and < 1.0.0" }
diff --git a/src/bullet_heck_gleam.gleam b/src/bullet_heck_gleam.gleam
index aa15d67..b904d10 100644
--- a/src/bullet_heck_gleam.gleam
+++ b/src/bullet_heck_gleam.gleam
@@ -16,6 +16,7 @@ type WorldState {
     player: player.Player,
     bullets: List(bullet.Bullet),
   )
+  GameOver(fell_in_pitch: Bool)
   // enemies: List(Enemy),
 }
 
@@ -31,102 +32,181 @@ fn setup(p: P5) -> WorldState {
 }
 
 fn draw(p: P5, state: WorldState) {
-  p5.background(p, "#000000")
-  dungeon.draw(p, state.dungeon)
-  player.draw(p, state.player)
-  list.each(state.bullets, bullet.draw(p, _))
+  case state {
+    GameRunning(dungeon, player, bullets) -> {
+      p5.background(p, "#000000")
+      dungeon.draw(p, dungeon)
+      player.draw(p, player)
+      list.each(bullets, bullet.draw(p, _))
+      p
+    }
+    GameOver(_) -> {
+      p5.background(p, "#000000")
+    }
+  }
 }
 
 fn on_key_pressed(key: String, _: Int, state: WorldState) -> WorldState {
-  case key {
-    " " -> GameRunning(..state, player: player.jump(state.player))
-    "w" ->
-      GameRunning(..state, player: player.accelerate_y(state.player, False))
-    "s" -> GameRunning(..state, player: player.accelerate_y(state.player, True))
-    "a" ->
-      GameRunning(..state, player: player.accelerate_x(state.player, False))
-    "d" -> GameRunning(..state, player: player.accelerate_x(state.player, True))
-    _ -> state
+  case key, state {
+    " ", GameRunning(dungeon, player, bullets) ->
+      GameRunning(
+        dungeon: dungeon,
+        bullets: bullets,
+        player: player.jump(player),
+      )
+    "w", GameRunning(dungeon, player, bullets) ->
+      GameRunning(
+        dungeon: dungeon,
+        bullets: bullets,
+        player: player.accelerate_y(player, False),
+      )
+    "s", GameRunning(dungeon, player, bullets) ->
+      GameRunning(
+        dungeon: dungeon,
+        bullets: bullets,
+        player: player.accelerate_y(player, True),
+      )
+    "a", GameRunning(dungeon, player, bullets) ->
+      GameRunning(
+        dungeon: dungeon,
+        bullets: bullets,
+        player: player.accelerate_x(player, False),
+      )
+    "d", GameRunning(dungeon, player, bullets) ->
+      GameRunning(
+        dungeon: dungeon,
+        bullets: bullets,
+        player: player.accelerate_x(player, True),
+      )
+    _, _ -> state
   }
 }
 
 fn on_key_released(key: String, _: Int, state: WorldState) -> WorldState {
-  case key {
-    "w" | "s" -> GameRunning(..state, player: player.stop_y(state.player))
-    "a" | "d" -> GameRunning(..state, player: player.stop_x(state.player))
-    _ -> state
+  case key, state {
+    "w", GameRunning(dungeon, player, bullets) ->
+      GameRunning(
+        dungeon: dungeon,
+        bullets: bullets,
+        player: player.stop_y(player),
+      )
+    "s", GameRunning(dungeon, player, bullets) ->
+      GameRunning(
+        dungeon: dungeon,
+        bullets: bullets,
+        player: player.stop_y(player),
+      )
+    "a", GameRunning(dungeon, player, bullets) ->
+      GameRunning(
+        dungeon: dungeon,
+        bullets: bullets,
+        player: player.stop_x(player),
+      )
+    "d", GameRunning(dungeon, player, bullets) ->
+      GameRunning(
+        dungeon: dungeon,
+        bullets: bullets,
+        player: player.stop_x(player),
+      )
+    _, _ -> state
   }
 }
 
 fn on_mouse_clicked(x: Float, y: Float, state: WorldState) -> WorldState {
-  let GameRunning(_dungeon, player, bullets) = state
-  use <- bool.guard(!player.can_player_fire(player), state)
-
-  let firing_direction =
-    vector.vector_2d(vector.subtract(vector.Vector(x, y, 0.0), player.position))
-  let player.Player(position: p, ..) = player
-  GameRunning(
-    ..state,
-    bullets: [
-      bullet.spawn_bullet(vector.Vector(p.x, p.y, 0.0), firing_direction, True),
-      ..bullets
-    ],
-    player: player.Player(..player, last_fire_time: utils.now_in_milliseconds()),
-  )
-}
+  case state {
+    GameRunning(dungeon, player, bullets) -> {
+      use <- bool.guard(!player.can_player_fire(player), state)
 
-fn on_tick(state: WorldState) -> WorldState {
-  let GameRunning(dungeon, player, bullets) = state
-  // Attempt to move player
-  let old_position = player.position
-  let moved = player.move(player)
-  let player = case dungeon.can_move(dungeon, old_position, moved.position) {
-    True -> moved
-    // If they can't move then just apply gravity
-    False ->
-      player.Player(
-        ..player,
-        position: vector.Vector(
-          old_position.x,
-          old_position.y,
-          old_position.z +. player.velocity.z,
+      let firing_direction =
+        vector.vector_2d(vector.subtract(
+          vector.Vector(x, y, 0.0),
+          player.position,
+        ))
+      let player.Player(position: p, ..) = player
+      GameRunning(
+        dungeon: dungeon,
+        bullets: [
+          bullet.spawn_bullet(
+            vector.Vector(p.x, p.y, 0.0),
+            firing_direction,
+            True,
+          ),
+          ..bullets
+        ],
+        player: player.Player(
+          ..player,
+          last_fire_time: utils.now_in_milliseconds(),
         ),
       )
+    }
+    _ -> state
   }
+}
 
-  let player = player.update_velocity(player)
-  let player = player.apply_gravity(player)
-
-  let bullets =
-    bullets
-    |> list.filter(bullet.is_still_alive)
+fn on_tick(state: WorldState) -> WorldState {
+  case state {
+    GameRunning(dungeon, player, bullets) -> {
+      // Attempt to move player
+      let old_position = player.position
+      let moved = player.move(player)
+      let player = case
+        dungeon.can_move(dungeon, old_position, moved.position)
+      {
+        True -> moved
+        // If they can't move then just apply gravity
+        False ->
+          player.Player(
+            ..player,
+            position: vector.Vector(
+              old_position.x,
+              old_position.y,
+              old_position.z +. player.velocity.z,
+            ),
+          )
+      }
 
-  let #(bullets, player) =
-    list.fold(bullets, #([], player), fn(acc, b) {
-      // If the bullet hits a wall then remove it
       use <- bool.guard(
-        !dungeon.can_move(
-          dungeon,
-          b.position,
-          bullet.advance_bullet(b).position,
-        ),
-        acc,
+        player.position.z <. 0.0
+          && dungeon.is_over_pit(dungeon, player.position),
+        GameOver(False),
       )
 
-      // Check if the bullet collides with something it can hit
-      let #(bullets, player) = acc
-      let player = case
-        !b.belongs_to_player
-        && bullet.collides_with(b, player.position, player.player_size)
-      {
-        True -> player.apply_damage(player, bullet.enemy_damage)
-        False -> player
-      }
+      let player = player.update_velocity(player)
+      let player = player.apply_gravity(player)
+
+      let bullets =
+        bullets
+        |> list.filter(bullet.is_still_alive)
 
-      #([bullet.advance_bullet(b), ..bullets], player)
-    })
+      let #(bullets, player) =
+        list.fold(bullets, #([], player), fn(acc, b) {
+          // If the bullet hits a wall then remove it
+          use <- bool.guard(
+            !dungeon.can_move(
+              dungeon,
+              b.position,
+              bullet.advance_bullet(b).position,
+            ),
+            acc,
+          )
 
-  GameRunning(..state, player: player, bullets: bullets)
+          // Check if the bullet collides with something it can hit
+          let #(bullets, player) = acc
+          let player = case
+            !b.belongs_to_player
+            && bullet.collides_with(b, player.position, player.player_size)
+          {
+            True -> player.apply_damage(player, bullet.enemy_damage)
+            False -> player
+          }
+
+          #([bullet.advance_bullet(b), ..bullets], player)
+        })
+
+      GameRunning(dungeon: dungeon, player: player, bullets: bullets)
+    }
+    _ -> state
+  }
 }
 
 pub fn main() {
diff --git a/src/dungeon.gleam b/src/dungeon.gleam
index 3d97242..8c900aa 100644
--- a/src/dungeon.gleam
+++ b/src/dungeon.gleam
@@ -33,7 +33,7 @@ pub fn total_size() -> Float {
 
 const pit_count = 5
 
-const pit_size = 30.0
+const pit_size = 20.0
 
 const minimum_pit_distance = 80.0
 
@@ -385,3 +385,9 @@ pub fn can_move(
     _, _ -> False
   }
 }
+
+/// Checks if a point is on top of a pit.
+pub fn is_over_pit(dungeon: Dungeon, position: vector.Vector) -> Bool {
+  use pit <- list.any(dungeon.pits)
+  vector.distance(pit.position, position) <. pit.size
+}
diff --git a/src/pit.gleam b/src/pit.gleam
index 0f32a48..7a7bf63 100644
--- a/src/pit.gleam
+++ b/src/pit.gleam
@@ -8,7 +8,7 @@ pub type Pit {
   Pit(
     /// The position of the center of the pit.
     position: Vector,
-    /// The size of the pit.
+    /// The radius of the pit.
     size: Float,
   )
 }
@@ -21,5 +21,5 @@ pub fn draw(p: P5, pit: Pit) {
   |> p5.fill("#3C3C3C")
   |> p5.circle(pit.position.x -. 1.0, pit.position.y -. 1.0, pit.size +. 1.0)
   |> p5.fill("#000000")
-  |> p5.circle(pit.position.x, pit.position.y, pit.size)
+  |> p5.circle(pit.position.x, pit.position.y, pit.size *. 2.0)
 }
diff --git a/test/dungeon_test.gleam b/test/dungeon_test.gleam
index 5bed4f6..1e7b20f 100644
--- a/test/dungeon_test.gleam
+++ b/test/dungeon_test.gleam
@@ -3,6 +3,7 @@ import gleam/dict
 import gleam/int
 import gleam/iterator.{repeatedly, take}
 import gleam/list
+import pit
 import room
 import startest.{describe, it}
 import startest/expect
@@ -92,7 +93,7 @@ fn validate_pits(d: dungeon.Dungeon) {
 
 pub fn dungeon_tests() {
   describe("dungeon", [
-    it("generated dungeons", fn() {
+    it("generate_dungeon", fn() {
       {
         use <- repeatedly
 
@@ -104,7 +105,7 @@ pub fn dungeon_tests() {
 
       Nil
     }),
-    it("can_move in a dungeon", fn() {
+    it("can_move", fn() {
       let rooms =
         dict.new()
         |> dict.insert(#(1, 1), room.initialize_unbounded_room())
@@ -164,5 +165,46 @@ pub fn dungeon_tests() {
 
       Nil
     }),
+    it("is_over_pit", fn() {
+      let rooms =
+        dict.new()
+        |> dict.insert(#(1, 1), room.initialize_unbounded_room())
+        |> dict.insert(#(1, 2), room.initialize_unbounded_room())
+        |> dict.insert(
+          #(2, 1),
+          room.initialize_unbounded_room()
+            |> room.set_navigable(room.Bottom, True),
+        )
+        |> dict.insert(
+          #(2, 2),
+          room.initialize_unbounded_room()
+            |> room.set_navigable(room.Top, True),
+        )
+      let dungeon =
+        dungeon.Dungeon(rooms: rooms, pits: [
+          pit.Pit(position: vector.Vector(0.0, 0.0, 0.0), size: 30.0),
+        ])
+
+      expect.to_be_true(dungeon.is_over_pit(
+        dungeon,
+        vector.Vector(0.0, 0.0, 0.0),
+      ))
+      expect.to_be_true(dungeon.is_over_pit(
+        dungeon,
+        vector.Vector(15.0, 0.0, 0.0),
+      ))
+      expect.to_be_true(dungeon.is_over_pit(
+        dungeon,
+        vector.Vector(20.0, 0.0, 0.0),
+      ))
+      expect.to_be_true(dungeon.is_over_pit(
+        dungeon,
+        vector.Vector(15.0, 15.0, 0.0),
+      ))
+      expect.to_be_false(dungeon.is_over_pit(
+        dungeon,
+        vector.Vector(35.0, 15.0, 0.0),
+      ))
+    }),
   ])
 }