I still have an earworm of the music from when I played the game yesterday :D
Came back just to listen to it again and beat my head against level 4, which I finally beat! Such a great puzzle with very creative controls!
There were some bugs with the lasers - Specifically, lasers that were removed from the scene and reloaded with the "Undo"/"Redo" buttons will consistently behave incorrect (Loaded in a wrong rotation and more). Also rotating 2 stacked cats would result in a floating cat sometimes...