the text looks nice. Do you have all those stages working, or just a moke up?
As for my patreon idea.... given what happened with touhou smash, that may not be the best thing. It's not crowd funding a game really, its supporting an artist, which they seem ok with but, check with someone first
Those stages are all working and in the game now. They will be playable come the demo release.
As for the crowdfunding, I never intended to crowd fund this, and if I did run a patreon, it would likely be to support me as an indie developer (for my other project), rather than to fund the development of Touhou Kart. Of course, I would check with ZUN before raising funds for or selling Touhou Kart (not that I currently intend to do either).