Heeeeeey! you've made it! Congrats!
I see you've learned shaders, animation and how to build the damn thing (on NixOS of all things)
I also see, that you didn't go for low hanging fruits like all 2d/3d system with working camera/level editor/collisions etc - basically, stuff one usually needs to build themselves.
As of the game - well, it works, few device names had me chuckle, fits them rules (10/9, colors and such), get's a bit tedious, though - might benefit from having "lives" or extra chances to put in right combo.
Hope, this experience with the engine could give you ideas on what to do and what not to do while doing engineless.