Browser incompatibility issues

[bleakley]

From a player:

Hey, so I tried your game out on multiple browsers. Here's what I
found. I couldn't get the arrow keys to work on any browser. The arrow
keys just scrolled the entire window up and down (not your game within
the window). I found this to be true on: MacOS (High Sierra)-Chrome,
MacOS-Firefox, MacOS-Safari, Windows 10-Chrome, and Windows 10-Edge.
Also the music didn't play within Safari.

Just to let you know.