freeCodeCamp/guide/english/game-development/gamemaker-studio
Alexandrull 6399fe8af3 Update index.md (#25391)
* Update index.md

grammar mistake

* changed itS to its
2018-12-13 14:13:40 -08:00
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index.md Update index.md (#25391) 2018-12-13 14:13:40 -08:00