Accessory add/remove needs to be easier. In priority order:
1) Remove all button.
2) Remove in any order (especially when you can't tell the difference, like double earmuffs)
3) Add in any order
lvl 8: build 12 lysosomes, recycle cloroplast, recycle lysosomes. cruise around for AA and glucose. at 2500 ATP, 1250 AA, build 50 toxin.
should be able to trigger indigestion before first wave, and finish before response waves hurt you.
The controls are responsive, and the amount of momentum is good.
Lines (or something similar) to show horizontal movement is nice, but the ball does not match the graphical style of the game.
Music is good, possibly add a button to change song. Buttons for music are not immediately obvious.
Consider adding enemies, moving sections, etc, so the levels are less repetitive. I liked the silver pearls level because it differed from the others.
Text messages and dialog boxes seem amateurish, not as finished and though out as the levels.
Speaking of which, add some more levels. Easy was over way too quickly, and Medium didn't take much longer. It's only an enjoyable time waster if it wastes enough time :)