Another question, this one regarding laser safety. I purchased the Galaxian Sky and plan to use its tunnel effect for people to walk through as people walk in to the venue. Are there any safety concerns regarding this use?

Not sure, but with lasers, it is generally recommended that it be aimed in a position where it won't be able to go into people's eyes.

I'd say use it to wash the ceiling of an entry/walkway should be the best application for your concept.