Alternatives

Products that do what I built a puzzle / programming challenge with a 0.125 BTC prize does

1. 1WA
   WordLines – A zero-knowledge proof-based blockchain puzzle game▲83

   2022 · github.com

2. 2IB
   I built a poker site with Haskell▲157

   2019 · github.com

3. 3AP
   A puzzle game inspired by functional programming, written in PureScript▲121

   2015 · david-peter.de

4. 4IM
   I made a boardgame about cryptocurrency trading▲7

   2018 · kickstarter.com

5. 5IB
   I built a jigsaw puzzle website▲124

   2021 · puzzlepanda.com

6. 6IM
   I made a HN for the cryptocurrency space▲17

   2018 · bitcombinator.io

7. 7IB
   I built a website that lets you freelance for bitcoins▲102

   2012 · btcworkers.com

8. 8
   Enigma Project▲89

   The first on-chain NFT puzzle game

   2021

9. 9IB
   I Built HN for Crypto▲18

   2022 · hodlernews.io

10. 10AS
    A successful penny-auction bot▲74

    2010 · github.com

11. 11PG
    Perfect Grid – my first iOS numbers puzzle game▲20

    2014 · itunes.apple.com

12. 12IM
    I made a fun real-time visualization of Bitcoin network activity▲36

    2021 · bits.monospace.live

13. 13IM
    I made a game (4x4x4 Tic-Tac-Toe)▲16

    2014 · phenomnomnominal.github.io

14. 14AP
    A puzzle game I wrote in JavaScript▲5

    2020 · victorribeiro.com

15. 15MF
    My first game – CryptoEmpire.io :)▲13

    I know everyone is a bit burned out on blockchain and cryptocurrency related stuff around these parts, but I've been working on as a side project for the last few months and thought you guys might be interested: https://cryptoempire.io/ It's still a bit buggy and incomplete (the mobile ux needs a lot of work, the leaderboard isn't functional yet, etc.), but I've reached a point where I'm not totally ashamed of sharing it :) Any feedback would be most welcome!

    2018

16. 16AB
    Anonymous Bitcoin Lottery▲35

    2013 · btc-l.com

17. 17IB
    I Built Conway's Game of Life for Ethereum▲5

    2021 · danhough.com

18. 18GF
    Games from a jam with a 1 BTC prize▲5

    2019 · gamejam2019.repl.co

19. 19IM
    I'm building a Bitcoin exchange simulator▲10

    2013 · sudogift.com

20. 20AG
    A game I made to explain binary search to non programmers▲7

    2019 · treasure.surge.sh

21. 21TF
    The first incremental game on the blockchain▲7

    2017 · blinc.click

22. 22MJ
    My jQuery puzzle game won my school coding competition▲5

    2025 · connect3.org

23. 23GO
    Game of Bins - Javascript Puzzle Game▲15

    2013 · gameofbins.com

24. 24IC
    I computed a 109M-digit prime candidate for the EFF prize using Python▲5

    Jan 2026 · github.com

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