ea77 is a futuristic logic puzzle game centered around energy circuit routing. Players take on the role of a digital circuit engineer, tasked with connecting power sources to target nodes by rotating interconnected tiles on a procedurally generated grid.

The core gameplay revolves around a unique energy propagation mechanic. Each tile on the grid contains circuit segments with specific directional openings. Players tap tiles to rotate them, aligning the openings to create continuous energy pathways. The game simulates real-time power flow using flood-fill algorithms, providing instant visual feedback as circuits connect and energy pulses through the grid.

Every puzzle is algorithmically generated, ensuring no two levels are identical. The difficulty scales organically — early levels introduce simple straight and corner connections, while advanced stages feature branching paths, multiple target nodes, and increasingly complex grid layouts that demand strategic thinking and spatial reasoning.

The application features a complete progression system with score tracking, level advancement, and performance statistics. Players are scored based on completion time, number of moves, and level difficulty, encouraging efficient problem-solving and replayability.

Three difficulty modes — Easy, Normal, and Hard — adjust the initial grid dimensions and scaling rate, making the game accessible to casual players while offering a genuine challenge for puzzle enthusiasts.

The interface follows a dark cyberpunk aesthetic with gold and cyan accent colors. Circuit tiles display directional connections with glowing energy lines that animate when powered. Source nodes emit a golden glow, unpowered targets appear in orange, and successfully connected targets turn green with a confirmation indicator.

Key features include a detailed tutorial explaining game mechanics, a statistics dashboard tracking lifetime performance, adjustable audio and difficulty settings, and an information section covering the science and history behind circuit puzzles.

ea77 combines spatial logic, strategic planning, and a visually distinctive cyberpunk presentation into a self-contained puzzle experience with infinite procedurally generated content.