Battle Arena
Choose your challenge and prove your prompting skills
Showing 15 battles
Calculator App
Build a calculator with basic and scientific operations, keyboard support, and history.
Countdown Timer
Create multiple countdown timers with presets, alerts, and persistence.
Unit Converter
Convert between units across multiple categories with real-time results.
Password Generator
Generate secure passwords with customizable rules and strength analysis.
Recipe Scaler
Enter recipes and dynamically scale ingredients by servings.
Emoji Picker
Searchable emoji picker with categories, skin tones, and recent usage.
Markdown Editor
Build a split-pane Markdown editor with live preview, syntax highlighting, and file export.
Snake Game
Build the classic Snake game with keyboard controls, scoring, speed progression, and a high-score board.
Image Gallery
A responsive image gallery with lightbox, filtering, and lazy loading.
Form Builder
Drag-and-drop form builder with preview, validation, and JSON export.
Poll Maker
Create interactive polls with real-time visualization and sharing.
Email Template Builder
A drag-and-drop email template builder with preview and HTML export.
Template Engine
Build a template engine with variable interpolation, control flow, partials, and inheritance.
CSS Selector Engine
Build a CSS selector matching engine that queries a DOM tree.
Browser Rendering Engine
Build a browser rendering engine that parses HTML and CSS, constructs a DOM and CSSOM, runs layout, and paints to a canvas.