Thanks I am going to be presenting the idea to someone this week, but I think I am going to be developing this game no matter what as an outreach type of thing. I'm pretty excited about it! It sounds like I'm going to have access to graphic artists to do the 100% of the graphics.
To keep things balanced I plan on slowly introducing power ups in a way that you can't three star the level without using them properly, but can three star it easyish if you do!