Cool ideas, but I think issues with the controls make it way harder than it should be. The way the walljump works makes it really hard to jump away from walls without accidentally double-jumping, and the spark is cool, but really hard to use well-- it feels like the slightest change in angle can send you flying into a red wall. The shot that grabs items made for a couple cool designs though.
The stuff Aeon said holds true for me too-- particularly the big hitboxes for the red floors/walls. There were many times where I clearly didn't touch the red part, yet still died. And I also couldn't get past the final room of the Metal Element room, as it required far too many precise mouse movements far too quickly for me to handle. Apologies if I missed something really cool by not finishing it.
In short, 'twas neat but far too unwieldy.