Some good ideas, and really something you were able to get it out so quickly.
I think it could benefit from a speed boost of some sort as it plays really slow.
(maybe have it cost more meter)
Some rocks wouldnt break, and not sure which colored keys you already had makes it difficult to keep track. ( maybe show the keys you already have at the bottom?)
Either way nice effort, keep at it!
Oh yah, it could use a sound effect button to lower the sound of the robot,