Hi there, I really enjoyed playing this!I'm not much for level design so I'll leave that to the experts, but there were a few UI issues I ran into?
Right now, as far as I could find, there's no way to reach the title screen once you've started playing. That is also the only place to swap betweenFull Screen and Windowed. Since there isn't a save feature right now, I had to restart my whole game to just exit/enter full-screen mode.
I also had to play in Fullscreen Mode because, with my smaller-than-average computer monitor, it overlapped the Windows taskbar and I couldn't shrink the window to make everything visible.
In short, my suggestions: 1) A way to return to the title screen, 2) a way to swap between Fullscreen and Windowed modes, 3) a way to change the window size.