The folder and def file don't have the same name

The first time the ball falls it can't bounce off the character. Seems intentional but it's also inconsistent with the rest of the game

Since you're using CPS-2 sprites I think you should resize the ball so it's actually round

I think hitting the ball should give you more points than letting it hit you. You could also make the points a function of damage taken

Could use an indicator of where the ball is when it exits the screen. Kind of like Marvel but in reverse

Could use hitsparks when the ball hits you

Geese's counter reverses the ball, thus making it inert (). All HitDefs should be projectile type and the Hitoverrides should include throws

Related to the above, as a safeguard you could make the ball go back to the top of the screen (like the first bounce) if it enters a state it's not supposed to

Ball bounce should also be triggered by Movereversed

For [State -2, PosSet], I think you should just make it the same position as the ball so that it triggers proximity normals and stuff

40 seconds is too long IMO

When the ball bounces off the corners of the screen, you forgot to account for its width. It should reverse direction a bit earlier than it does now