I'll see if I can make a less optimized build that doesn't rely on the browser's PNG decoder... Very very weird and not something I'd expect to vary across browsers X_X
(I'm using a PNG to encode the map and your map looks wrong in both cases haha)
Ah, now it all works as expected. My 2.43s time was also based on a bogus victory pad, and there's no way to get "outside".