Yeah sure, I give my permission to use any ideas I suggest. I would like to help ya with this project as much as I can.
And also, you should try Touhou 19. The story might be boring at times but CPU battles are fun. I usually open it sometimes and play against Lunatic CPU's on Yuuma. It's fun. (Although I am not a good player by any means, I was only been able to 1CC Touhou 8 on Normal difficulty)
I might have some ideas on magic items in the future, I will surely suggest more later. (Afterall, I really love making magic items at the tables I am playing DnD in. Would be nice to have some Touhou options here too.)
See ya later my friend!