After everything initializes and your Android and web previews set up, open chat by clicking the little Gemini spark at the bottom of the workspace and then add your prompt.
YMMV, but I got a very basic, but working chess clock in one shot with "Can you replace this sample Flutter project with a fully-functional chess clock that works on Android and on the web?"
But try this:
Open up a blank Flutter template in Studio: https://studio.firebase.google.com/new/flutter
After everything initializes and your Android and web previews set up, open chat by clicking the little Gemini spark at the bottom of the workspace and then add your prompt.
YMMV, but I got a very basic, but working chess clock in one shot with "Can you replace this sample Flutter project with a fully-functional chess clock that works on Android and on the web?"