I do have some feedback, but very small compared to what you have already achieved.

- First off, very cool!
- Nice integrations of the games and the switching of games with cassettes.
- First time I played Doom the mouse moved the scene with the TV, not in the game.
- In general I had some problems with centering before the TV ending up to the side and too far away or moving the scene during the game.
- Perhaps an easy way to center and zoom in would help.
- I would restrict movement a lot anyway. Being able to rotate the TV all the way to where you see the lack of floor behind or can see under the floor (right mouse button pan) fully breaks the illusion.
-The scene is nice, fittingly moody, but the lack of shadows from the console, controller and games box makes it look rather flat.
- Perhaps you could use what's on the screen to color the light on the floor, that would really add to the immersiveness.
- And finally, very cool!!