Great game - very compelling & fried my brain bit too while on auto-pilot! 👍
(I was on a roll for a massive score, but alas, lost it when I panicked-pressed at the end)
TIP: Might be easier on players to actually use the X key with BTN(5) - as you're currently mixing buttons by saying "Press X", when BTN(4) == 🅾️ in PICO-8, not X.
(Try the gamepad/input tester, just to the right of your game screen above to confirm)