tiagozip / cap

privacy-first, open-source and self-hosted CAPTCHA alternative with PoW and instrumentation challenges.

pcottle / learnGitBranching

An interactive git visualization and tutorial. Aspiring students of git can use this app to educate and challenge themselves towards mastery of git!

drJhonatan00 / Crystal_Clicker

Crystal Clicker is a fast-paced, web-based hybrid game that blends idle clicker mechanics with escalating tower defense strategy. Designed with pure Vanilla JavaScript and styled using modern CSS glassmorphism, the game challenges players to protect a glowing central crystal core against relentless waves of invading enemies.

sadanandpai / frontend-mini-challenges

Collection of frontend challenges for learning and interviews

gkaramanis / tidytuesday

Code and plots for submissions to the #tidytuesday challenge

romanticamaj / promptasy

A browser game to learn prompt engineering by playing — explore a world and solve challenges by writing prompts. Techniques from OpenAI, Anthropic, Google & xAI, each cited.