Smooth gameplay and very satisfying progression system, but the loop of fighting very few enemies except for when a horde spawns which then signals you're about to fight an excessive number is a miss. The mix of set in stone rooms and procedurally generated 'filler' between then isn't bad but it doesn't really add anything either.
The visuals are once again a highlight, it's a shame they get undermined by the previously mentioned excessive number of enemies on screen during hordes.