The latest articles on DEV Community by Esmeralda Van Groesen (@essiecodex). https://dev.to/essiecodex https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4199036%2Fc338c49e-a6bf-4e27-9e26-4be21a788a0b.jpg https://dev.to/essiecodex en Esmeralda Van Groesen Wed, 21 Oct 2026 19:31:04 +0000 https://dev.to/essiecodex/i-built-a-free-coding-game-with-18000-questions-can-you-predict-the-output-2jn4 https://dev.to/essiecodex/i-built-a-free-coding-game-with-18000-questions-can-you-predict-the-output-2jn4 <h1> Can You Predict What This Code Will Output? </h1> <p>I recently launched <strong>OUTPUT? — Code Prediction Game</strong>, a free browser-based game that challenges developers to predict the output of real code snippets.</p> <p>The idea is simple: you see a piece of code, analyze what it does, and choose the correct output.</p> <p>But as the difficulty increases, things get interesting.</p> <h2> What's inside? </h2> <ul> <li>Approximately 18,000 coding questions</li> <li>18 programming languages and 6 technology stacks</li> <li>5 difficulty levels</li> <li>Practice and challenge modes</li> <li>Daily challenges, XP and streaks</li> <li>Global leaderboards and achievements</li> <li>Assessments and certificates</li> </ul> <p>Whether you're learning Python, practicing JavaScript, or challenging your understanding of programming concepts, the goal is to make learning more interactive.</p> <h2> Built with AI — but shaped by a human </h2> <p>I developed OUTPUT? as a solo creator using Gemini and Google AI Studio.</p> <p>AI helped me build and iterate on the application, but designing the experience, identifying problems, testing questions and refining gameplay required continuous human decisions.</p> <p>One of the biggest challenges was ensuring that coding questions have clear, predictable answers. Ambiguous questions aren't useful when you're trying to learn.</p> <p>I'm still improving the game based on testing and feedback.</p> <h2> Try it yourself </h2> <p>🎮 <strong>Play OUTPUT? for free:</strong></p> <p><a href="https://output-code-predict-26.ai.studio/" rel="noopener noreferrer">https://output-code-predict-26.ai.studio/</a></p> <p>No installation needed.</p> <p>I'd particularly appreciate feedback from developers:</p> <ul> <li>Are the questions technically correct?</li> <li>Does the difficulty progression feel right?</li> <li>Which programming languages or features should I improve?</li> </ul> <p>I'd love to hear how you score!</p> programming ai gamedev showdev