Genuine OSR feel, the gm-relief of Knave, all the flexibility of Fate and Cortex, all the wildness of Troika, all the simplicity of FU, and so easily hackable and tack on-able, that at the end, I can do anything with this game, and handle it in a truly simulationist manner. Less is more in this case. Right in line with the FKR. I ran a oneshot game with my uncle as my player a while back, turnwd out great. System was easy to well, grok, on quick and fundamental level. I've also played it solo and plan on doing much more of such. I've also gone out my way to make new rules, like sanity, corruption, a custom hp system, reworked sequencing, saves, and what I like to call "special conditions"(conditions that temporarily lower an attribute value). I don't use or plan on using all of these all of the time, I like the game as is, but it just goes to show how easy you can add. I've also made very simple solo rules, which are placeholders till you make yours, as I remember you talking about them on reddit. Overall, literal 10/10 game, deserves to go down in history as a masterwork.
Also, as for the next solo game I'm going to do, I'm gonna play in a homebrew setting, and I'm going to play a shapeshifting dragon going around as a troubleshooter and justice bringer. I wanted to do this in fate, but it would've taken making whole extras and stunts and way too much work. Here, I can just have the traits and assets, and figure out a simple mechanic for transforming, like an attribite roll, or having some requirement or limitations both ways, as I want for there to be a chance for the character to be stuck in his true form for a bit.