Bugs begone

• GUI items now scale properly, cursor should be working better
• Loading a level screen looks better
• Minor fixes/changes to levels 1 and 3
• Fixed fonts for WebGL
• Gravity in working order
• Bullet trajectoru on point
• Planning on changing up the bullet design

BUG

Levels 1 and 3 don't have the white colour for WebGL (I have no idea why)