Stream Runner: Difficulty as a Speed Curve, UI Reduced to Two Buttons

A minimalist auto-runner case study: score equals distance, a one-obstacle-one-button mapping, and how a 0.6s dodge window keeps high speeds readable.

Complexity

Beginner

Tech stack

PIXI / v2-kernel

Core points

Collection economy cut: score equals distance, so the speed curve is the only difficulty knob / Binary mapping: one obstacle type per button, failures are easy to attribute / Window 0.6s < interval floor 0.8s: you never face more than one obstacle at a time / Speed ramp stacked with shrinking intervals; gentle slopes make the first seconds a tutorial