Great game, graphics and music especially are really beautiful ! Concept is simple but works well, and overall game is really nicely polished, rebindable controls were a life saver, putting the growth controls on the mouse wheel really felt better.
After reading your comment the other day I ended up trying it with mouse wheels as growth and that does work very well! Definitely depends on the particular mouse, but mine worked out very well especially with left and right buttons as moving controls.