Thank you  for the feedback :)

I wanted to make an ending where Zeus or a Fury appears in front of you and then sends you back to the bottom or something along those lines, I also wanted to do more elaborate textures for the background platforms and Sisyphus and his boulder.

Originally the system for my bullets had their position be changed by transform.position constantly every update depending on the position they were shot from, But i wanted my bullets to bounce off platforms and walls so i changed to be an initial velocity and direction on their rigidbody, which caused some funky stuff like the phasing through platforms you describe, I procrastinated quite a bit with this one.. so that's on me hehehe, the reason the bullets shoot you into the air is because I have them apply a random force in a random direction to the player's rigid body when they collide, it's supposed to be a mechanic, but all of them need a ton of adjustment.

Well, maybe I'll pick this project up again once I finish my finals, once again, thanks for the feedback, I'll take it into account if I do come back to this project.