Really annoying. I can't speak on whatever experience you could have in the preset world since I used a random world, but this game really enjoys throwing random bullshit at you with not many feasible ways to get away from, especially on the later floors. The enemies basically range from annoying to "you are basically dead if you encounter this" and those deadly enemies can just completely block your way as well! The only way to escape some of the Turbo Fuck™ enemies are to make use of the items you collect, which you have no clue of what they do until you use them, but and they can hurt you too, even outright killing you in some cases. And thankfully the collection I played this on had a fast-forward feature since game is pretty slow too. Your movement speed paired with how elevators and ship parts can be very far from the start of each floor can make the game a real slog to play.

Also I remember getting a quicksand covered floor with multiple ice cream trucks swarming me all at once and I can't say I was happy with that experience.