I really liked the simplicity of this game! A great concept, that really made me wish for more once it was over! I think that with a bit of visual polish and more levels, this could become a really cool and addictive game!!
I ran into a few glitches though, and I think that adding a stage reset button would help frustrations of reloading the entire game :b
One glitch was by pressing E and then W in quick succession, resulting in the visuals not really matching the collision
Also, when you fall, you can climb up on platforms you pass, even if they are "flying". This could however be pretty neat as a feature in the game, by designing levels that make use of it!