Show HN: I built FlipCards – a flashcard app with variations to improve learning (flipcardsapp.vercel.app)

I built a tiny browser game that throws rapid-fire addition puzzles at you and tracks your best streaks. Each round is just 5 problems, so it’s all about speed and focus.

Instant guest play (no signup) with a Real-time top-10 leaderboard (shortest time as tiebreaker) and a personal game history.

You can check out the code here: https://github.com/sarthaksoni25/AddVenture

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