I did update the game and so that should have likely fixed the issue with the particles I think. There could be some stuff that I still missed out on. But yes as for the other stuff you mentioned, I did make like a more proper tutorial for the Game, so hopefully for the most part that does explain how the UI and the gameplay functions..
I am not entirely sure how you mean weird in regards to the Hall though, the only thing I can think of is like the second camera not fully showing the downward path, so i kinda tweaked it a bit so the path is more visible now..
As for the third point yes I have considered how to develop the gameplay further, I am still not sure about all its details yet, but it most likely wouldn't be just straight up stats boosting upgrades. I am considering it to be more like Charms from Hollow Knight, with a proper build of sorts that kinda stacks together. The details are still hazy but thats the general idea. Hopefully its fun.
Either way thanks for playing the Game.