Wow, I didn't expect this detailed feedback. I really appreciate it! I decided to release this to check whetehre or not the core mechanics are fun, and I know that there are a lot to work.
I agree with most of your ideas. I also really enjoyed the games you mentioned, Dead Celles, Dark Souls, and the like, and yes, I'm kind of trying to rip off best of these games.
My mission is to simplify these great games so that I can keep the amount of work small and handle it, and at the same time, more casual gamers can get the intense joy of playing hardcore games.
I'm still a learning indie developer on every asepect of making games, because I used to be a server programmer and my specialty was in Cloud Computing, which is quite far from making indie games. My plan will be making more small games like this to cultivate my art, music, game engine skill, so that I eventually make a game like you imagined.
Thank you again and I'll keep you posted!