It's a bit of an odd mechanic at first, but it works fairly well. I did encounter two notable issues, however:
- The bubble overlay for placing objects blocks the lasers in the later levels.
- Going back into the game after finishing it takes you to the end screen, meaning you can't replay from the first level.
Regardless, it's a well put-together game. The levels are diverse and do a good job of exploring different behaviors of the mechanic, rather than just having the same solution in a different room layout. Nicely done!