The iFrame upload string fails because Scratch blocks direct embedding via X-Frame-Options and requires a specific /embed URL format.
To resolve this, convert the project into a standalone HTML file using a tool like TurboWarp and upload it directly to Kongregate as an HTML5 package. As always, please test the game in preview mode in the Developer Portal, and verify the game works before submitting.
Support
iFrame | Game doesn't work in iFrame on Kongregate
SUBMISSION | Checklist before uploading a game
STANDARDS | Developer Content Standards
ASSETS | How can I safely use third-party assets (art, music, code) in my game?
TOOLS | Can developers use AI tools when building games?
DOCUMENTATION | What documentation must developers follow?
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