WASD increases how fast you move and in what direction, aka velocity for our scientifically minded Scratchers. Don't touch the walls and try to get out of the maze. The end is the maroon thing. Levels 4-6 might not be possible. I don't know. EDIT: Level 4 is possible, Level 5 is very very hard but possible, and Level 6 appears to be impossible. Also the "Distance Traveled" and "Average Speed" are in the basis of the level you just did, they only work on the maze part.
At the end it now gives you your distance traveled and your average speed. [The space bar function I removed, it made the game too easy and I'm extremely sadistic :D This displays the sciency ideas of distance travel and average speed.
