While the graphics are nicely drawn, I did miss any tutorial. It would have been nicer if you introduced each item individually. There seemed to be no way to reset levels, which makes the game very punishing. There are also quite some minor problems. The Energy and Rescues bar size are covering much of the controls. I think that problem comes from wrong scaling with screen resolution. Also, the spikes seem to not be working.
That said, it is still a good prototype, and I hope this comment doens't come across as to harsh. Keep on learning, keep on making games!