Draw your way to the goal. Hit E to erase. 25 levels. Go to the portal. It loops. M to toggle music. Red-purple pen color means you will fall through R to reset
For @galaxylegend_lelo after he wanted to see what i could do with pen. If you want a challenge and have a magnet or something to hold down E you can try and beat all the levels with a single dot (I did it it is possible)
