This is super sweet!

My only gripe is that it doesn't seem to be very desktop friendly. I'm on FF 192.0.2 (64bit) and I can't figure out how to pan or zoom around the play field.

It would also be nice to see a "par" or statistical breakdown of levels compared with other people. The randomness might make this a bit tricky but things like Crypt of the Necrodancer use seeded levels and, presumably, seeded RNGs for other elements of the randomness in levels to make it consistent across players.

Super simple and super effective. Very nice.