I've written quite a few games in the past (as a hobby), but am in the mood to contribute or fork an existing game (with existing assets). I'm a Java dev and like multiplayer games, and I can't bothered with all the extra complications that 3D games bring, so I'm looking for a 2D game, probably a platformer. I've tried looking for one, but it seems very hard to find a project by these parameters. In particular, being open source, surely the language is one of the first thing potential contributors will be looking for, but that seems to be the last things that gets specified. Anyway, I digress; can anyone point me in the right direction to a game that fits these criteria?
Thanks in advance!