It works now! Thanks for the quick fix!
This was super fun & sweet! I really enjoyed both the core mechanic and the twist of playing back through the levels. I had a bit of a hard time remembering the mechanics in the second half, but that's not a criticism of the game at all. Maybe if the game were longer, you'd get a bit more experience with each new mechanic before accessing the next. I think this is a perfect UFO 50-sized game!