Neon 2048 Merge Builder

This prompt instructs Claude Code to build a complete, polished neon-synthwave 2048 merge puzzle as a single self-contained HTML file -- just open it in any browser, no installs or servers required. Smooth tile sliding and merging on a 4x4 grid, glowing color-coded tiles that brighten as values climb, a win state at 2048 with the option to keep playing for a higher score, and a persisted best-score tracker all come built in. Fully customizable color palette and grid size, clean commented code, and a fast build time make it a great addition to any game portfolio or arcade site.