Black is for the ground, it is solid. Red is a hazard, you lose if you touch it. Green is the goal, you win if you touch it. The rest of the colors are for the background. Use 1-8 to choose colors. Up/down arrows to change brush thickness. Space to start your level, E to continue editing, C to clear.
The edit music is an Animal Crossing midi. The play music is the Mario theme but WahWah style.
