Cool concept! I made it through the end and I really enjoyed! I love that you have three different levels each one with different mechanics and perspective, nice!
Just to mention that I had a bit of trouble using the jumping properly in the first level, ending up many times in the spikes :S. Also I would like to comment, that it was very difficult to hit enemies without getting hit back, I think tuning this a bit will add a lot to the gameplay.
Good game overall! well done!