I don't know if it is intended but when asked to input the secret code in the sewers you can just back out then try and enter it again and it will let you through without putting in the code. Granted the code is really simple so I don't know if it this should matter but just something I found. Also sometimes in combat the companion will attack a already dead enemy, didn't happen often but it does happen.
There also seems to be bug where after every fight you get a blank page with continue written on it and you don't get exp from fights meaning you have to start a new game. Granted this was right after starting a new game I was going to use for testing some stuff out, so I don't know if this can happen mid run.