Dune Dash Premium Endless Runner

Builds a complete endless runner game in a single HTML file. No libraries or images needed. A fox runs on its own while you tap to jump, with double jump and hold-for-higher jumps. Dodge cacti, rocks and low flying birds, and collect coins. The sky shifts from dawn to day, dusk and a starry night. Includes sound effects with mute, saved best score, and start and game over screens. Works on phones and desktop. Easy settings at the top of the code.