Bug Fixes and Damaged Monster Image

This week, I fixed two pretty annoying bugs. In yellow soul, the pellets fired would occasionally phase through projectiles, and on green soul, when you had invincibility frames, projectiles would phase through the soul instead of disappearing. All I changed was before I only checked for collisions when the soul didn't have invincibility frames, but now, it always checks.

Also, now when you hit the monster, it changes its image to another one.