Cool idea, but I think the controls could be improved. It's difficult to use WASD on one side of the keyboard with one hand, then the mouse on the other side of the keyboard with the other, then letting go of one of those to use the arrow keys. I think the arrow keys left and right should be replaced with Q and E, or with Left Mouse Click and Right Mouse Click, where the middle mouse click selects things.
Other than that though, great game! I enjoyed it, but I can't rate it because I haven't submitted my own entry.