Real gravity, real walls. It falls onto your actual floor, bounces, and goes sideways when it hits a wall — because the page is given the geometry of the surfaces around you and collides against it.
Three ways, best first. Which one you get is decided by the phone, not by this page, and it is reported below the moment a session starts — never assumed.
| Planes — real floor and wall polygons arrive on their own. Nothing to tap. | unknown |
| Tap — you tap the floor and each wall. Works on any phone that does AR at all. | unknown |
| Box — no real surfaces found, so it bounces inside an invisible box in front of you. | fallback |