Yea, the controls were pretty ad hoc. If I redo it, I think I'd wind up binding grow/shrink to the Mouse Scroll wheel and the Axis bindings to Q/E. Preferably with some method of directional input to fix the finicky jumping.
I also like how you taught the players the controls, I grasped the basics very quickly. Nice work!
Very glad to hear that! Doing passive tutorials is always a risk, so I'm glad that paid off!
Thanks for playing and thanks for the feedback!