Sadly it doesn't seem to generate UVs for the models. But using the cube projection in Blender seems to do an OK job. Add a skybox and a couple of simple particle effects in PlayCanvas. And we have some WebGL spaceships :-) https://playcanv.as/p/kZtPZpnH/
Holy crap that site basically stops my computer.
Runs flawlessly on my 2015 MBP on it's native display.
Drag the window over to my cinema display, and holy 4fps and crash batman!