Great to watch the marbles, very gd file and easy to print.
Easy print and assembly. Works well as the first module in the Two Wheel machine - the dumping of 4 marbles at a time adds to the visual excitement. Nice chunk-chunk-chunk noise as the marbles wind their way out of bottom of the run.
I figured this was a reference to an old video game, Donkey Kong. I had never played it, but when I googled screen shots of the game I got the connection. Fit was better on this than on some other modules.
Got a nice little beat when the marbles go down the shoot.