Fans of rhythm games will love Timewarp, a browser game that will really challenge your abilities. It works like Guitar Hero, you have to tap rhythms that are moving towards you. There are a number of keyboard configurations – I prefer the left hand ASDF setup. The twist with TimeWarp is that the better you do, the faster it goes, and the harder it gets. See if your fingers can keep up!
Requires the wonderful Unity plug-in .