A lot of these issues should have been resolved in the latest hotfix version: books not being saved and that push block solving itself leading to a softlock.
Planning to have less linearity in the proper game. The idea being if you get stuck on a puzzle, there are other routes you could take.
The extra bridge tile on “Bat Country” is an accidental red herring. I spent about 2 hours making that map (usually they take me around an hour), but just before DD submission I realised you couldn’t backtrack from there. Bridge was a quick, messy fix to save me from having to redesign the whole puzzle.