Hello! I just streamed your demo for a small audience. If you want to watch the play-footage and see my reaction, you can find footage here.
https://www.twitch.tv/videos/1453570033
If you don't have time to watch that, I understand! I'll just give you my feedback, features that I think would improve the game.
1. Sound effects are very loud compared to the music, in some cases jarringly so. Please A) lower the volume of the sound effects by default and B) give us an options menu where we can adjust the music and sound volume independently.
2. I encountered a crash when encountering the masked cat, which you can see in the footage. Just in case that helps you with bugfixing.
3. I had absolutely no idea how to defeat the electric enemies. I struggled in the upper floors for quite some time, until someone in stream chat looked it up for me and told me that it's possible to throw lances. I had never used that skill before. To fix this, I think you should include a reminder to players that throwing lances is possible, possibly in one of those books lying around?
4. When electric enemies zap the player, the player often becomes stuck inside one of the suits of armor, with no means of escape.
That's it! Thanks for your demo!