am i allowed to make a transparent boundary?, for tile maps this would be ALMOST required, but if @kenney dosen't have a boundry asset, then things would look ugly in the editor, as i would be using a random sprite, and hiding it at the begging of the game, also am i allowed to say, add a jetpack or hat onto a sprite?(tip to others: don't do that, make a separate sprite and glue it using events)

Also, Kenney's Pattern Pack could work for this. Just take one of the square patterns and make it red or some other color.