Code & quizzes: Apache 2.0. Modify and redistribute freely.
Embedded Vim editor by CodeMirror: MIT.
Some remix ideas: Woodpecker method drills, children's learning, etc.
Absolutely. Are you scared agentic coding might make Vim obsolete? Just put Vim in Antigravity’s text box.
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Automatically in browser localstorage. Click “Progress” to back up or restore progress.
It supports core Vim editing and a simulated multi-file workspace. Pattern exercises use native Vim syntax.