Sort Adorable Cats!
Collect Cute Cats!
Relax and Play!
Decorate Cozy Rooms!
Hundreds of Puzzles!

About the project

Cats & Sort began with a simple question: what if a satisfying color-sort puzzle could feel like caring for a tiny world instead of just clearing a level?

We loved the instantly understandable, calming rhythm of tube-sorting games, but wanted to give every solved puzzle more meaning. So we built a cozy cat-collection game where players sort adorable cats by color, earn stars, welcome them into a growing home, and decorate rooms as they progress.

The goal was to create a game that is easy to pick up in seconds, satisfying to play in short sessions, and warm enough to return to every day.

Our team

We are Rotten Games, a team of three friends who have known each other since our first day at university. We had already been building and experimenting together for years before founding our studio, which gave us a strong rhythm: move quickly, discuss openly, prototype early, and keep improving the work together.

Each of us brings a different perspective across game design, art, product, and engineering, but we work closely across all of them. That small-team setup lets us make decisions fast and stay close to every detail of the player experience.

What we built

Cats & Sort is a free-to-play mobile puzzle game with:

Hundreds of hand-designed cat color-sort levels
Cat collection and a cozy home to grow over time
Stars, room decoration, rewards, and daily progression
Offline-friendly play for quick, relaxing sessions
Premium content and in-app purchases managed through RevenueCat

RevenueCat gives us a clean, reliable foundation for monetization across platforms. It helps us connect products, entitlements, and purchase states without maintaining separate purchase logic for every store flow. This lets us focus more of our time on making the game better and less on handling purchase edge cases, restores, and premium unlocks.

How we built it

We built Cats & Sort in Unity through a fast, highly iterative process. We started with the core sorting mechanic, then gradually layered in cats, collection, stars, rooms, rewards, and progression.

As a small studio, we test ideas quickly and refine them constantly. We use modern development and creative tools to speed up parts of our workflow, but the game’s direction comes from our team: deciding what feels satisfying, what is visually clear, where players may get stuck, and which features actually make the experience more cozy and rewarding.

Challenges we ran into

The hardest part was finding the balance between “simple” and “meaningful.”

A sort puzzle needs to be readable at a glance: players should immediately understand where each cat can go. At the same time, the game needed enough long-term progression to make every completed level feel connected to something bigger. We repeatedly refined the UI, cat designs, level difficulty, rewards, and room progression so the experience stayed clean rather than overloaded.

Monetization was another important challenge. We wanted premium content to feel like an enhancement to a cozy game, not an interruption to it. RevenueCat helped us structure this more reliably and gave us confidence that purchases and entitlements can scale alongside the game.

What we learned

We learned that the smallest details have an outsized impact in casual games: a clearer tube, a better animation, a more satisfying reward moment, or one less distracting UI element can change how a level feels.

We also learned the value of working in a team that knows how to move quickly together. Because we trust each other and communicate directly, we can turn feedback into improvements fast without losing sight of the larger product.

What’s next

We are continuing to expand Cats & Sort with more levels, new cats, room-decoration content, daily systems, events, and stronger live operations. We are also preparing to learn from real player behavior during soft launch and improve retention, progression, and monetization based on that feedback.

Cats & Sort is our attempt to turn a familiar puzzle mechanic into a small place players genuinely want to come back to.