Virtual pet: build a Tamagotchi-style app

Your own Tamagotchi on your phone: a little dragon you feed, play with and put to bed. Build it from one prompt in Gemini.

What you’ll get

A little dragon and three bars: Hunger, Fun, and Sleep. They slowly drop on their own, and you press buttons to keep your pet happy. Press “Play the example” above. It’s exactly what Gemini made.

Steps

Open gemini.google.com. If you’re under 13, do it together with a parent, on their device.

Copy the whole prompt and send it:

Make a virtual pet for phones in one HTML file. Don't connect anything from the internet: no Tailwind, no CDN, no fonts, no images, only your own CSS and JavaScript inside the file. Don't save anything in the browser's storage. In the center, a cute little dragon drawn in SVG. Under it, three bars: Hunger, Fun, Sleep, from 0 to 100, each one slowly going down on its own. Three buttons: "Feed", "Play", "Put to bed", each raising its own bar. If any bar is below 30, the dragon is sad. Show the result in Canvas.

Wait about a minute, press Preview, and take care of the dragon.
Check the AI (see the question above).
Press Download (sometimes it’s in the Export menu). The file opens in any browser.

Change the prompt

Before sending, swap a few words to get your own version. Change only the words, and keep the rules about the internet and Canvas.

“cute little dragon” → “cute kitten” (and “the dragon is sad” → “the kitten is sad”)
“slowly going down” → “quickly going down”, which makes it harder to take care of the pet

Make the pet yours

Send one change at a time and check the result:

Replace the dragon with a kitten.
Add a fourth bar "Cleanliness" and a "Wash" button.

If it doesn’t work

The AI says it changed everything, but the pet is the same? That happens a lot. Write: The pet didn't change. Show the updated version in Canvas.
No “Preview” button? Write: Show the result in Canvas.
The buttons don’t work? Describe what you see: “I press ‘Feed’, but the bar doesn’t go up.”