Fabulous little game!
I've only gotten up to level 14 so far, but I'm already hooked. The intuitive interface and simple controls leave the mindwracking puzzles to take centre stage. I absolutely love the fact you included an undo button as well; I've seen this in too small a number of puzzle games, but it's soo convenient when you realise you've started to go astray. Of course, a reset button is still great for when you just completely screw up, so thanks for including both. The way the robot faces light up when you complete a level is also a really charming addition.
What else can I say? It's a really well made game, and I shall accept your challenge to complete all 32 levels. First, I just thought I should say what a great job you've done. :)