I just tested the game on two other Macs, with less than pergfect results. The other Macs are older, have less powerful GPUs. On an old MacBook, with GMA950, I could make it run once I turned off the shaders, and even then it ran less than smooth.

But I believe that the judge's Macs were rather better than my main MacBook, and then it should work just fine. I better upload a shader-free version just in case. It doesn't look as good but the chance of running at all improves a bit.