I wrote the author about this game to let him know how much I love it, and to see if there was a way to replace the graphics in the game with custom ones, but alas his e-mail is dead.
A shame, he may never know that someone really took to all his hard labour.
As for what sort of machine this needs to run?
I don't have the docs handy, but ECS for sure, prolly just 1Mb of Chip RAM, dunno if any fast is required, but I've had success running this on a stock 600 and then later with 030 added on. Plus I've ran it on my 060 Amiga. Neither gave me issues.