I found a way to gitch outside of the map on the tutorial stage!

Stand on the green awning of the practice house and drop a gateway at the floor, throw the other straight up. Going thru will put you on top of the box and you can then move around the outside of the level. Jumping into the void will let you fall for about 10,000 m without hitting a kill plane. After that point you teleport back to the spawn. Not sure what really can be done with this but if anyone could use this info its speedrunners