Mystic Mine

Mystic Mine could be described as an arcade puzzler. Using only one key you have to guide your minecart through the various tracks, picking up diamonds and bumping into other players. It's frantic, fun and best of all: it has multiplayer support for up to six players! A great party game, in other words. Just get all your friends and gather up in front of a big screen. Pretty pixel graphics are included too!

You need python to run the game, so running the source release can be a bit complicated. But if it sounds like your thing, it might be worth the extra work.

The M.C Escher-inspired level layout is really cool.