I've created a complete top-down alien shooter game in a single HTML file using Phaser.js. The game features: - Player movement with WASD keys - Spacebar to fire bullets at aliens - Procedurally generated graphics for player, bullets, and aliens (no external assets) - Health system (starts at 100, decreases when hit by aliens) - Score system (increases when aliens are destroyed) - Increasing difficulty with each wave (faster aliens, more aliens, shorter intervals between waves) - Wave progression with automatic spawning of new alien waves - Collision detection between bullets and aliens, and aliens and player - Visual feedback with explosion effects when enemies are destroyed or player is hit - Game over screen when health reaches 0 The game runs entirely offline with no network requests and uses only the provided phaser.min.js library. The UI displays current health and score in the top-left corner, and the game ends with a "GAME OVER" message when the player's health reaches 0. All graphics are created procedurally using Phaser's graphics API, including: - Player: Green triangle shape - Bullets: Yellow squares - Aliens: Red circles with white eyes - Explosion effects: Yellow circles that fade out The game is ready to run immediately by opening index.html in any modern browser.