Hit the flag and wait for all the black tiles to appear, then click them to change their color. You can do this to draw stuff. Hit SPACE to reset the screen to all black. Press and hold X to erase individual pixels. Hold a number key to draw in a given color.
I got a little bored during a programming session, and a thought came to me to make something simple instead of a huge game that takes three hours to make. It came out really well, and although Toryu wasn't really impressed that much, I still think it's fun. I hope you enjoy it! -Comet P.S: The way the tiles appear was inspired by Pokemon.