Press flag and then P to load it up. You'll have to drag the hitbox out of the ceiling. WASD to control it, S to hit switches. If you want, you can check out developer's mode by hitting the K key after hitting the stop sign. Answer with "yes" to any questions it asks. In developer's mode, you can hit C to clear and S to save. 123456789 or 0 to check out the inventory system that's also a WIP. If you hit space, don't mind the black line. It's just a very WIP sword o-o