Good game mired by bad controls
Overall the game was good, a fairly decent defense game. The inability to see what amounts to half the screen keeps things frantic, even when you get to the point where you can mow down bugs with one shot. By keeping you moving it keeps things interesting. However while the game is never dull it does suffer from two issues. The first is the story, which doesn't make much sense, but since it's an arcade style game the story doesn't matter at all. The big thing is the controls. Tapping the spacebar with thumbs is slow and awkward. So the compromise I found was to shift a hand so that I could tap with the fingers. This meant while eating I either couldn't shoot, or wasn't ready to move. Now while eating and moving sounds redundant, during the more hectic moments screwing around with shifting hands really gets annoying. My recommendation would be to take out the jump, which is utterly useless, and reassign the eat function to the W key. Alternatively keep it at the spacebar, but switch it to a hold function, possibly freezing the bug and adding a meeter to measure eat progress. Either the tapping, or imobilizing the bug while eating will still keep the pressure of choosing between defense and growth, without the needless hassle of using the thumbs to tap or shifting hands.
Also, as a side note, this sort of game just screams for an endless/endurance mode.