Level 4 and Music

New:

-Level 4
-Background music

Improvements:

-Controls improved, now you can also jump with W
-Buttons now have a feedback sound
-Game restarts after ending

Bug fixes:

-Lantern's trails now resizes depending on the distance of the light
-Lantern's shot now properly vanishes
-Level 3 bar now properly resizes
-Fade out panel covers the entire screen
-Rocks now properly resizes when in a smaller space
-Time on tutorial texts reviewed
-Intro animation reviewed