The critical fix: FAKE-08 swallowed the FIRST button press after a cart load
(the _clearInputOnResume guard returned unconditionally, so btnp never fired and
carts couldn't leave their title screen). Patch
(scripts/patches/fake08-romdev-input-resume-fix.patch) makes it fall through to
deliver that frame's real input; wired into build-fake08.sh alongside the memory
patch, both declared in versions.json.

The 5 genre example carts are now genuinely complete + play-tested in the window:
correct sprite-sheet alignment (128-char gfx rows), readable pixel art, the real
Columns-style 3-jewel puzzle mechanic, solid platformer collision (crossing test,
no tunneling), and looping title music (public-domain melodies — Ode to Joy,
Mountain King, etc. — transcribed to correct PICO-8 sfx note data, with music(-1)
going quiet + SFX-only during gameplay). Also gitignore the playtest-autosave junk.