Hey, go visit Indiebuskers.net
and get involved in Sneaky Brats! As an online game it doesn't exactly do much unless you can get a bunch of people on at the same time, but gather your buddies in the Hamumu chat and arrange it!
If you're wondering what it is, it's an online Capture-The-Flag game for up to 32 players. Each player can equip 2 of the 3 Imagination Powers: You Can't See Me, The Floor Is Lava, and Flappy Arms. Using these sneaky abilities, grab their flag and get away!
One thing not too obvious is how tagging works: If you're on your side of the field, you tag opponents (otherwise they tag you!). If you have the flag, you can't tag anyone.