The help page for scirra arcade is broken.
https://www.scirra.com/arcade/game-manager/help
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I also can't update the image for my game, I read that Tom is the main guy for scirra arcade stuff.
FYI:I tested this on multiple computers with the latest version of chrome.
My game: https://www.scirra.com/arcade/action-games/wall-pong-17015
Picture I uploaded:
* moved as not a bug in C2 but a website issue that Tom will need to examine.
Tom will need to examine.