Really fun concept and it's super responsive and bouncy, Nice job. I got a crashing game every time after level 3. I don't know if this is intended or not.
Definitely not intended. The crashes are due to bad optimization, and if playing from the zip file, crashes are even more likely. I have a favor to ask, if you played it from within the zip file, could you try extracting it, and then playing it, and tell me if it still crashes the same amount?