the reason to not use the mouse is so that you dont click accidentaly between waves on it! Also, I programmed it in C and havent made selection boxes with click yet so thought it would also make my life easier to just use a number haha
thanks for the input. One thing I would change at this point is limit the red balloon max speed more (there is a limit but is too high at the moment). it could even scale with wave number, as some things in this game do. Anyway, glad you enjoyed it!