Robot Unicorn Attack
Robot Unicorn Attack Heavy Metal Edition
"ALWAYS, I WANNA BE WITH YOU, AND MAKE BELIEVE WITH YOU!"
That's from the song 'Always' by Erasure and by god, it may be the catchiest song I've ever heard. It's used in the game Robot Unicorn Attack, the most rainbow filled unicorn game ever made. It's also fantastically fun!
You control a robot unicorn that frolics between floating bits of land, trying not to fall to your death or crash into giant stars. You only have two controls: jump and boost. When you boost you zoom forward with a blast rainbows behind you. You can also destroy the stars while boosting.
Now, if rainbows and Erasure aren't manly enough for you, there's also a heavy metal edition that pumps up the nightmare factor of the game, literally. The first game is available online in flash form if you can't afford the price for the apps.