5.7.1 is live — thanks for the feedback so far!
The first room now keeps one small, dismissible hint for the next action you have not learned. Your first upgrade opens its real before/after gun comparison automatically, and Learn to play stays on the title screen for the safe pistol warm-up.
I'd love three to five first-time players to try about ten minutes with a keyboard and mouse. Please share your best moment, the first confusing or frustrating moment, roughly how long you played and which room you reached, and whether you actually restarted after dying. Stopping early is useful too. Returning players are welcome; just mention you've played before.