I wanted something fun to run on the new Arduino Desktop system I've been building, and I wondered if I could run a 3D voxel game on its processor: the Teensy 4.1. A game like this has quite demanding graphics, but other than that, these games are not particularly difficult to run. So, does a 600Mhz Teensy 4.1 have enough horsepower to crank out a simplified Minecraft clone? I bet it does; let's find out.