Play and test my game, UNFAIR

http://www.flowlab.io/game/play/754929
It’s meant to be an insanely difficult platformer, though I may add an Easy Mode which would have checkpoints. Level 5 under construction, and levels 3 and 4 are being expanded at the moment.

How do you like it?
Please suggest improvements and obstacle ideas.
Name ideas are appreciated.
Please post any bugs or glitches.