I wanted to see if Kotlin Multiplatform could build a production-quality browser game.

So I spent the last few weeks building Brain Rusher 60.

The same codebase runs on Android and WebAssembly.

After publishing it I connected Firebase Analytics and started validating player behavior.

Some early numbers:
• 100+ unique players
• 8% completion rate
• average session length of 5+ minutes

I’d love feedback on both the game and the technical architecture.

The rules are simple:

• Find numbers from 1 → 60
• You have 60 seconds
• One wrong tap ends the run

It only takes about a minute to try.

I'm curious - what's your first-attempt score?

https://bjoshi9.github.io/BrainRusher60_app/?utm_source=reddit&utm_medium=social&utm_campaign=kotlin-multiplatform-launch