Thanks OllieScott! You're right, a tutorial would have been nice. Alas, given the timeframe, I couldn't pull that off.
You're also right about the shooting. The reticle should have been replaced with something else. It makes you think that if you're going to click in that direction, you should fire in that direction; but the truth is, he always shoots straight ahead of him. Originally, I made the squirrel a turret, but it was really weird to turn his head completely around. Even if I limited his angle, it was still weird that you could freely put the mouse wherever you wanted yet he could still only fire in front of him. So maybe I need to rethink using the mouse at all. I just liked the feeling of the Lt-Click = FIRE, rt-click = HEAL, both at your fingertips. It brought home the point for me that you're making a distinct choice how you're spending your nuts.
Anyway, thanks for playing, OllieScott! And I should also say: Congrats on winning 2nd place in the contest! I actually considered making a Reigns-style game. Fits into the theme well. =-)