Pretty nice sliding block puzzle game. I also had a bug where I hit test and it wouldn't complete the puzzle in level 2. Mine wasn't the toilet, but the other one. I did the toilet first so maybe it's an issue with clearing the 2nd completed puzzle? Anyway, solid game. Well done.

I couldn't finish level 2. On the toilet puzzle, I connected it up, but pressing "Test" didn't clear the puzzle.

Unfortunatly can't play it. The exe says it's missing  the .pck file. You should probably bundle both the exe and pck file in a zip archive and upload that as one download next time.