A major limitation they wanted to overcome was screen size. A projector mounted to the ceiling should turn the entire wall behind the machine into a massive 15-foot playfield for anyone in the ...

If your projector will be mounted flat to the ceiling we think this will work ... This goes perfectly with the $50 projection screen that he built.

One of the main issues is they really need a screen. This is true of any projector, but especially one that's throwing its image almost vertically, potentially spilling light on the ceiling.