I am going to guess you got stuck in the caves. The issue is you have to explore every bit of them to acquire all keys and the master key in order to go forward and reach the boss. From then on the game should click in with you. It did for me. Even if my game got bugged out twice and had to restart it. I just finished it and think that it is a good game considering it was developed by a single person . Sad some achievements are also broken. but at least I got the ending ones. Was surprised to see only 7% across all platforms ever finish it, judging by the achievements rarity. In GOG that being supposedly just 2.3% is even more shocking as the game is not hard unless you attempt to 100% it.. But maybe it is the technical issues that caused such a low completion %. Anyway, hope you do finish it.

I made it to the mole boss and I'm not in Act II. I plan on playing it today. Thanks for the info. I'm also not playing it on Galaxy so no stats will save here.