My project is a simple game. You press the button “Launch!” and this creates 15 coloured balls, 10 blue ones and five pink ones with numbers. They bounce around the screen, being confined by the borders. (Perhaps the accelerometer will also dictate which way they are bouncing? I haven’t decided yet.) You need to touch the pink balls in order (1-5), and once you do, they explode. This could be made more difficult by speeding up the rate at which the balls bounce.
This explosion is cool, I might try to simulate something of this sort but simpler, with just flat colours like these screenshots.