b2e367817c6e3ea6a5d8c73d6dff99434ba9d037
Add progressive puzzle mode alongside the existing sandbox: - 8 levels from basic gates to 2-bit adder - Truth table verification with pass/fail feedback - Gate restrictions per level - Custom components system (save circuits as reusable chips) - Save/load circuits as JSON - Level selection sidebar with difficulty ratings - Mode toggle: Sandbox (free play) vs Puzzle (guided levels) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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