Technically the Python bool is fine, but it’s part of what makes numpy special. Under the hood numpy uses c type data structures, (can look into cython if you want to learn more).
It’s part of where the speed comes from for numpy, these more optimized c structures, this means if you want to compare things (say an array of booleans to find if any are false) you either need to slow back down and mix back in Python’s frameworks, or as numpy did, keep everything cython, make your own data type, and keep on trucking knowing everything is compatible.
There’s probably more reasons, but that’s the main one I see. If they depend on any specific logic (say treating it as an actual boolean and not letting you adding two True values together and getting an int like you do in base Python) then having their own also ensures that logic.
My gaming groups (both tabletop and video) are leaning into experimental phase of trying new stuff. Count me in if I ever come across your release in the wild.
On the music and visual side. If at all possible I highly recommend finding or hiring someone to at least review what you have and advise, if not doing all the work. There’s so much to both that it takes ages to get right but they can have such a huge impact as you seem to know.
I just replace all my tests with noop codes. Quick, easy, passes.