I have actually been involved in developing a version of this myself. In the process of structuring the characters and looking for developers as we speak. I wasn’t aware of Ninchanese, however, I had thought there was nothing on the market for Mandarin.
I do have some issues with the way Ninchanese works though…Prefer Wanikani’s structure, openness, but also strictness.
Polv, I took a look at your deck and I think the main challenge you will have with your approach is the lack of structure of Radical, Kanji, and Vocab similar to Wanikani. HSK vocab lists I’ve found omit one character words. Perhaps it’s not as necessary to have two separate categories in Mandarin as it is in Japanese because most Mandarin words can be used by themselves anyway.