Whack a mole
Something pops up, you tap it before it hides again · Game ●●○
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Prompt
Make a whack-a-mole game. Make it a single HTML file that opens in a browser with nothing to install and no other files. Put the CSS and JavaScript inside it. Do not use image files or any external address; use emoji or letters if you need a symbol. Draw a grid of nine holes. a mole appears in a random hole and hides again after a short time. I tap it to score. A game lasts 30 seconds. Speed it up as the game goes on: start with about one second visible and get down to about half a second by the end. Do not let the same hole be used twice in a row, and do not score a tap on an empty hole. Show the score while playing, and the final score with a play-again button when time is up. When you are done, tap an empty hole on purpose and check it does not score.
What it uses: One file only · Say what it is first · Decide what shows · Pin down what not to do
If it stays too easy, ask it to "shorten the visible time as the score goes up".
Paste what came back
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