as people have brought up, the slide puzzle is a little bit of a pain point. if you know even a little bit about the slide puzzle algorithm it isn't that bad though, it only took 4 attempts to get the 5 and 10 minute speedrun achievements in the same run. love the atmosphere and graphical style. maybe add an option to skip those cutscenes in the beginning, and an option to view the completed slide puzzle configuration after you complete it so you can note it for next run.