I loved the game!! The way you introduce new mechanics without needing a tutorial is great. The controls feel a little bit tight, but even so you get used to them in no time. The only problems I had were with the colors. The purple world hurt a little bit and in the first world, the white one it took me some time to realiza that i could go to the opposite side by "exiting" the screen. I was playing the web version and some of the backround is white making me think it was a wall so maybe add an effect similar to the one you put on the teleporters to make it more obvious.
Waiting for more levels!