Use your mouse to move the runner. Every time you click the green flag, the color of the runner and the background changes. Click the flag until you get the color you want! :)
All 100% by me, and all 100% pen. (The runner, the effects, the border, the rocks, and the background are all pen, and no costumes.) You can run infinitely. Nothing happens if you hit a rock, but you can try dodging them. You can change if you want rocks or not by changing the variable at the top. 1=Rocks, and 0=No rocks.