You are a box. And this is One Screen Platformer 1. You, being a box, must jump on slightly larger boxes to progress through the level. Also, there are portals. So, uh yeah, I guess you can do whatever you want. Just hurry up and get to the red end portal to end the level. Good luck.
I used Jackson Academy's how to make a simple scratch platformer in 8 minutes YouTube video. If you want to make a simple control scheme for a platformer, watch his video. Or you could just remix mine and make new levels because I already followed the tutorial and also I need more viewers soooo... also yes i did make the level, that one is all on me.