Thanks! I try to keep things as optimized as possible so the game loads quickly and runs well on slower devices. Right now it still loads instantly without a loading bar and everything feels nice and responsive, which I'm really happy about.
For Nix runs, I feel like the Shimmera and Umbra layers are the toughest. Once you make it past those two layers, you usually have a good chance of reaching Deepwater, unless you get really unlucky with restore cell spawns in the Void layer.