CoasterMania's room-aware mixed reality update lets you build rollercoasters over your real furniture on Quest 3.
The game can now utilize the room mesh Quest 3 generates during mixed reality setup to let you place tracks on your actual floor, tables, sofas, and other furniture. The coaster cars can even crash into your furniture and explode when they go off an unfinished track.
You can choose to watch the train ride along the track you've built at miniature scale in mixed reality, or go into a VR first-person view. Since Quest 3 only captures the geometry of your room though, not the texture, the first-person mode uses a default green-brown terrain texture overlayed onto your room mesh.
The update also adds a new mixed reality Puzzle Mode to the game, where you solve physics-based puzzles that adapt based on the size and shape of your real room.
You can grab CoasterMania for $10 on Quest App Lab.