Thanks for playing it, your feedback was helpful. I did not even know about the bug that lets you get up on the wall, or the one with Ester's skills. I had thought I had tested those out, so I'm not sure what I changed after it that broke it. As far as the mercs, there is a check that should prevent you from hiring more than 2, which worked in testing but must be something else I missed.
A lot of people seemed to forget about the key item menu when it came to using the...key...item...yeah I guess it is not something people are accustomed to having to do because it happened on several playthroughs.