Click green flag twice. You are a thief robbing the bank. Get to the vault to beat the level. Move with arrow keys. You climb brown(rope) to get up. Don't be spotted by the floodlights, touch the lasers, or let the guards catch you. You only have three chances or you lose. On level 4 wait a second for the floodlights to disappear. Also on level 8 wait a second for the guard to get in the right place. On level 6 and level 9 you get one life back. There is an anti-cheat mechanism.
Thanks @redstone8 for the platforming script (Since I'm too lazy to do my own) All levels are possible 12 levels so far All art made by me(even though it's not that good) More levels coming soon