If you're tired of minigames, make a slightly larger games (don't overshoot, you'll be surprised how complexity kicks in quickly).
Also, try to build the things the 'right way'. Nail down controls, build a good camera system even if you don't seem to need it, and then apply it.
For example, what would pong be if it had a proper camera and the ability to have camera shakers?
The upside to this is that these are systems you'll need to work with on larger team, so better be familiar with them asap.
Possibly, your assignment on the larger team would also be in that vein as well (something small/medium nearly independent from others, but nonetheless important).