The PSN exclusive is almost the textbook definition of short-but-sweet. It's also got one of the best implementations of multiplayer ever seen in a video game. You can read Kirk's review of the game here.
You can see more of Zac's work at both his personal blog and game-themed site Magical Game Time. If you're feeling commercial, you can buy prints and shirts here. He'll be back on Kotaku with a new comic same time next month!