Hot&Cold App
An interactive Flutter game that challenges players to pinpoint hidden targets using animated heat-or-cold feedback
The Challenge
Creating an intuitive touch-and-guess interface required precise detection of tap placement inside custom polygonal areas across varied screen sizes and resolutions. The feedback mechanism had to deliver instant heat-or-cold responses through fluid thermometer animations. Additionally we had to build an admin panel for level creation allowing designers to draw and adjust answer zones with pixel accuracy
Our Solution
We implemented client-side polygon hit-testing with a winding-number algorithm in Dart optimized for real-time performance on Flutter. Thermometer animations use the Flutter animation framework with custom shaders to ensure smooth feedback. The Next.js admin panel features a drag-and-drop polygon editor, image upload and metadata tools to streamline level design. In-app purchases are handled via Apple Pay and Google Play Billing.
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