Bloodstone - Part 3 | Undertale in Python

Here I am back at it again! Enjoy.
Updates:
A diagonal collision system: diagonal gaster blasters are now in the game.
A blinking effect for the soul: to show that its currently using its invincibility frames.
New characters! These are my very own sprites; they don't have names right now, but will soon in the future. If you have any suggestions for their names, comment down below. I'll pick the comment that is most liked.