I made a free browser game about brushing a cat — what's the wildest reaction your product ever got?
So I shipped something weird last week and I'm still processing the feedback.
It's a free browser game called Brush Nooli. You open it, there's a sleeping ginger cat, soft music, purring sounds. You brush her. The fur reacts. She shifts a little. People have called it "genuinely meditative" and "the only peaceful thing I've done all week."
And then — if you brush too fast, or get too confident — she wakes up.
I'm not going to say what happens exactly. But I've received three voice messages from friends who screamed out loud. One person knocked over their coffee. My cousin texted me at 11pm to ask what is wrong with me. A stranger on the internet said they're sending it to their therapist as evidence of something.
I built it as a cozy side project. I wanted something calm and tactile. The animation is frame-by-frame, the brush feedback took forever to get right, the audio layering was the most fun I've had in months. Then I added the wake-up moment — went through six versions of it — and somewhere in that process I accidentally built a friendship-ruining machine with fur.
The part that gets me is that nobody feels tricked. Everyone who gets scared comes back and says "okay that was genuinely my fault." That was the goal — consequence, not cruelty. Mostly.
I'm curious — has your product ever done something you didn't fully plan for?
Maybe it went viral for a completely different reason than you built it. Maybe users found a use case you never imagined. Maybe the reaction you got was nothing like what you expected.
Drop it below — I'd genuinely love to hear what happened when your thing hit real people for the first time.
(And if you want to try Brush Nooli yourself — brushnooli.com — free, no login, works in any browser. Just... don't say I didn't warn you.)

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