Cool game, nice ideeas but..
The energy..it drains too fast.
I have no problems with the weapon controls, except that I found spikes a bit funny, you shouldn't take damage when you ram with them.
I would suggest making the cells you divide into to have a mind of their own, would make the game more easy in this regard. It should have more visual representation of skills, membranes and stuff.
At the achievements, when you unlock them I see we get some new skins for the cell, it would be nice to know -exactly- what we get.
All in all, a good idea but needs much much work.
 "War of Cells"){kind=icon}
 "Music Catch"){kind=icon}