I just played
Upgrade Complete, a very amusing shooter over at
Kongregate - in which you have to buy and upgrade EVERYTHING in the game - including your ship, the graphics and even the copyright screen. It's a great statement on the state of micro-transactions.
I hope they do a second version as the game play is a little unchallenging - the enemies don't even fire back and there are no sound effects and I would have liked to see the graphics get really ridiculously detailed as they got upgraded but then again, it's just about you obsessing about getting more coins.
All-in-all a fun concept.