STOP v1.1 Coyote Time!

A bunch of small fixes:

1. Coyote time added - it's much more forgiving when jump off ledges
2. Bigger bullets - a little more forgiving when shielding yourself from lasers
3. Restart using the R key
4. Added two key options for stopping time and shooting to accommodate different play styles
5. The red colour is now consistent
6. Player looking wrong way on bullet when travelling to the left is fixed
7. button gets pressed down
8. PFF level missing collider on walls added
9. Added no friction material to bullets and falling blocks

Major features I plan on adding in the future:

• A low contrast colour scheme option
• Save progress / level select
• Ability to remap the keys
• Music / sound toggle
• New levels and mechanics