And yes, I agree that it's so difficult to perfectly balance game to be challenging, but still fun. I had to playtest my game with some random people and it helped to tweak it :p
Ok, it's sad to hear that you run into the door-bug. That's only happening on the Web version. The windows version is fine.
You almost finished the tutorial, but I guess you won't give the game another try to see what comes after the tutorial.
