In advance I want to say thanks for respecting players' time since it's just a jam!
I really adored the dimension change mechanic. I must say without much polish it was a bit difficult to understand where you will appear after switching back to 3d, though, so a few times my ball got lost because of confusion - but it's ok since you did not have much time for polish. Also the ball movement is... well, you know it's buggy.
I'd really like to say more or give you an idea on something, but sadly the game is so small that I can hardly offer anything apart from my small praise.
BUG: you can jump while in air. I used it a few times >:) because buggy ball wasn't moving the way I wanted.
Overall, you did a good job! I indeed liked the game! If you ever make a sequel or sth similar with this dimension change mechanic, I'd like to see it! Also I humbly want to ask you to play and rate my game - I'd be very glad if you did!