Current state (v0.0.2-alpha): the game boots through bundled OpenBIOS and plays — through the opening (including the intro cutscenes, which now decode and play), into stages, with working controller input and memory-card save/load, and no known crashes. It has not yet been verified all the way to the end.
Stage gameplay works and there are no known crashes, but the game has not been verified from start to finish. If you hit a hang, crash, or wrong behavior deep in a stage or boss, that's the kind of thing worth reporting — capture where it happened.
The shared PSXRecomp upload-rectangle fixes resolved the intermittent black-frame flicker. OpenGL is now the release default; software remains selectable, and the updated framework also provides Vulkan.
The background tile-window, HUD, object-activation, and primitive-cull hooks are implemented and exposed as the default-disabled Widescreen mod. Authentic 4:3 remains the default. The 16:9 path is experimental and should be reported with the stage and scene when a background, HUD element, or object behaves incorrectly.