In case Hack/Katie/anyone else want to actually do some races again.

Princess Remedy in a World of Hurt http://store.steampowered.com/app/407900/
Less than an hour, free, not extremely freaking difficult.

Deity http://games.digipen.edu/games/deity#.VybQcHqGPgA
Free digipen game. ~an hour. Stealth-based gameplay.

Thomas was Alone
Platformer/Puzzle game starring a bunch of rectangles.
3+ hours, so not as good.

Manos the Hands of Fate
8-bit game based on the worst movie ever made
~1 hour

The Great Work http://nifflas.ni2.se/?page=The+Great+Work
Atmosphereic exploration game with a nice soundtrack
2+ hours
FREE

NightSky
2-d ball platformer. I can't not reccomend this as I've put like 800 hours into various projects related to this game. ~2 hours?

Anyone have any more suggstions?