Fun game! A bit tricky as well, which I like. There's a lot of fun you can do with that type of mechanic. I also didn't run into any bugs. There were some things I could comment on. My main problem was the controls. I think it would have been better to keep space bar as the jump button for all shapes. Since it's one of the main buttons you use to move around, it gets a bit messy in the head trying not only find the right buttons to change shape, but also to jump. Another one were also that some parts it would be nice if you could either move the camera down manually a bit, or if there are some placed out "camera zones" where the camera will move automatically to let the player see below better, because when I needed to drop down, I didn't really know what was there and kinda had to fall first time in order know what to do.
I think the level was good. When I got to the point where I needed to figure out which shapes to use in what order I felt challenged and really wanted to get past all the obstacles, which is great. I think I got the point where there was a collision error and couldn't get further, otherwise I would have kept going and try finish the game. Great job on the game! keep it up :)