Use arrow keys to move. Don't touch anything black, including the walls. Touch the yellow to go to the next level. If you survive for 10 sec you get a level. CAN YOU GET PAST LEVEL 10?
Credit: I give all of MY credit to GLaDOS for no reason whatsoever, i did make all the stuff and GLaDOS did not do anything... W A S D keys don't work... sorry! In hard mode there are Bouncing Dots that... bounce. This is a hard game, in hard mode, in easy mode its... easy... BTW by just camping in a corner you still die on LV 8 because the moving platforms move SUPER fast, then the game breaks and at LV 8 you can not even move, ok yeah i DID get to LV 24 on hard mode by sitting in a small corner but try doing that while MOVING Ok i make that LV 30