Advent of Code 2025 visuals built with Kotlin Multiplatform and a Compose Multiplatform UI, targeting:
- 🖥️ Desktop (JVM)
- 🌐 Web (Kotlin/JS target)
This repository goes beyond being a simple collection of puzzle solutions. Its main goal is to provide visualizations for each Advent of Code 2025 challenge, turning the daily problems into visually rich experiences.
Each day’s solution is crafted not only to solve the puzzle, but also to present the logic and results in an appealing way, with a consistent Christmas-inspired theme across the entire app. Animations, layouts, and color choices aim to capture the festive spirit while remaining clear and readable. To reinforce the seasonal atmosphere, the project includes a custom AGSL (Android Graphics Shading Language) shader that simulates falling snow on supported platforms.
You don’t need to clone or build the project locally to try it out. A companion GitHub Pages site is available here:
👉 https://manuel-martos.github.io/advent-of-code-compose-2025/
This runs the Kotlin/JS target directly in the browser, allowing you to explore the visualizations instantly.
On some days, the web version may exhibit performance or “threading-like” issues. This is due to the fact that Kotlin/JS does not provide true multithreading, and its coroutine support is implemented as a single-threaded, event-loop–based simulation on top of JavaScript. As a result, solutions that rely heavily on concurrency or long-running computations may behave differently compared to the JVM/Desktop version.
ℹ️ Tip: Use Ctrl/Cmd + Click to open videos in a new tab.
| Screen Recordings | |
|---|---|
| Day01 | Day02 |
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| Day03 | Day04 |
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| Day05 | Day06 |
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| Day07 | Day08 |
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| Day09 | Day10 |
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| Day11 | Day12 |
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Advent of Code by Eric Wastl: https://adventofcode.com/
Solution for some days has been inspired by Marcin Wisniowski (@Nohus) and his awesome solutions here.