Played a few runs. The death naming is the best idea in here and it earns its spot: "TOO EARLY / YOU FROZE / DUCK TOO SLOW" turns a wipe into a diagnosis, so I know what to fix on the next run instead of just feeling bad. Two frictions I hit.
1) The copy and the controls disagree. The listing says "one button, tap to jump, hold to duck" but the build ships two explicit buttons (plus tap-the-field). As a player the explicit buttons are kinder, nothing gets eaten, so I'd keep them and fix the pitch rather than the reverse.
2) The HUD only shows "best". Mid-run I couldn't see my current score or how close I was to it, so the run had no thread to pull and the retry hook felt weak. A live count, or a "best 77, you're at 40" line, would give the "one more" its reason.
Minor: tap-the-field-jumps surprised me when the buttons are right there. If it's intentional, say so; if not, it competes with DUCK.
Duck vs jump legibility is good (blue vs orange). Good bones.