managed to reproduce the bug. I think the princess peach feel would be cool if it changed your air time based on how long you hold the button. I like the changing physics due to your size idea, that would really help sell the size changes
Thank you for taking the time to make a screenshot! That is actually not a bug but it's obviously not signaled well by the game. The tall potions make you tall and the wide potions make you wide. The non-uniform scaling is something I added late in development. I think it's interesting but I probably should have left it out in this version.
I agree about the air time, that's an excellent suggestion.