Just finishing up some things...

Features:

1. Added an short invulnerability state for about a sec and a half after getting hit.

2. Added particle effects and trails to Derabella's projectiles.

3. New sprite for baddie's projectile.

4. Asset folder so things aren't so messy

Fixes:

1. no more enemy flicking when killed

2. no more crashing when hitting two baddies at once