I'd love to know a bit more on the details around the screen...
- What are the dimensions of the screen, room, and the distance (or expected distance) of the player from the screen? Knowing this could help some of us attempt to use visual illusions.
- Will there be sound available? Depending on this we could try to craft audiovisual or purely visual experiences.
- How are the physical controls? I'm thinking of using the arrow keys, but I'd only be using two of them, which could allow me to use the other two for a second player. That would depend on whether having two players share controls would be cumbersome or not.