Hey love this, super cute brain teaser with very lovely art.
I was able to find a little teeny bug, which is that on the level with the red button and the blue fella trapped in the box, the spikes on the left side of the screen have a slightly offset hitbox. I was able to stand ontop of the spikes sprite to the left, but would die if I stood next to them on the right. A fun little bug which I was very excited to play around with.
Great work!