I think you can make this game a little more challenging: Maybe an option that restricts the number of shapes you can draw, or something similar to that?
Super Fast Forward: Click the fast forward button, then open up another tab. If you have sound on, you'll notice a rapid increase in bloon poppage. This helps tremendously if you're on a tight schedule. The bad side to this is that you can't see if you're losing. It's your choice whether to use it or not.
+ This so other people can know this trick :D