In 3 weeks, there is going to be a competetion named JS13K Games and over 30 days, you will be given a theme and must create a game in JavaScript including this theme.
It would be pretty simple to do, but the game must be less than 13 kilobytes. In comparison, my entire site is over a hundred times as big.
I am going to be making a game for this, but since it's not here yet so for now I'm only going to work ont he engine for my entry (which will be in 3d).