Wow, I'm amazed that you were able to create this in just 4 hours! It's really impressive. I do have one small suggestion though, which is to consider changing the keybinds. Most players, including myself, are accustomed to using the Spacebar for jumping, so I kept making mistakes. I found that using the mouse button to change dimensions and using WASD along with the Spacebar for normal movement would be much better (that's what I used in my own game). Apart from that, great job! By the way, if you don't mind, I would really appreciate it if you could give my game a try as well.