Hey, I had the version you posted on the devlog months ago but was experiencing a bunch of crashes so I bought this version, hoping it would be more stable but im still experiencing crashes a lot :/ specifically, every time i try to solve level D5 (What Goes Up...) by combining the 3 skull blocks, the game immediately crashes. Hopefully this can be fixed soon!
In the situation below the three skulls wouldn't match. As the fan is still blowing on the bottom right skull when you take the top skull away the bottom right skull would be rising as the middle skull is falling, meaning the middle and right skull should match before the middle one can fall far enough to reach the leftmost one.
What should happen is the two skulls should match and the remaining one on the left should start flashing and show a message letting you know the level is now unsolvable. I'll test some scenarios including the one shown and see if it crashes for me.