Flexbox Defense – learn CSS flexbox by playing a tower defense game
Your job is to stop the incoming enemies from getting past your defenses. Unlike other tower defense games, you must position your towers using CSS!
Flexbox Defense – learn CSS flexbox by playing a tower defense game launched on March 2, 2016 with 243 votes, #83 of 4,409 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 10 years on.
In plain words
Flexbox Defense is an educational tower defense game where players position defensive towers using CSS flexbox properties instead of clicking to place them. Designed for people learning web development, the game teaches practical CSS layout skills through interactive gameplay. Players must stop enemies from advancing past their flexbox-positioned defenses, combining game mechanics with hands-on coding practice.
written from the facts on this page · September 2026
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