Sling your Square to the top. Drag from the square to sling. For some reason certain screen sizes/resolutions allow you to stick to walls, or cause incorrect collisions. I am working on fixing this issue. If you have this issue, try going to the largest possible screen size.
No walls. No arrows. Lol. Just find the flag. World Record : 7.294 seconds by @JoseteManero 2. 8.062 seconds by @mateo32123