Use arrow keys to move and up to wall jump. The level counter goes up by 100 every time you go up instead of sideward.
This was made for unclepinchy as he couldn't get the costumes to work so I did it for him, click above to see his project (it might be fixed by now though). I couldn't fix it :( However, I have the costumes up so put the costumes in your backpack and remix the original "thing" by unclepinchy, then put the backpacked costumes and fix the code if you want to.