How do I upload games to arcade?

hmm it keeps saying that "Zip contains file extensions not on the whitelist"

my game is 750x750 px, all files are from the exporting process directly.

Yep you'll have to check the project to make sure you don't have any 3rd party plugins that are NOT allowed.

Even if you tried it and didn't use it it must me removed from the list as well so it does not get packaged with the project zip.

I hope this helps

Yep you'll have to check the project to make sure you don't have any 3rd party plugins that are NOT allowed.

Even if you tried it and didn't use it it must me removed from the list as well so it does not get packaged with the project zip.

I hope this helps

my project doesnt have any 3rd party plugins, just a simple showcase of a platform example. Any further suggestions? thx.

Have you followed Ashley's tutorial?

https://www.scirra.com/tutorials/82/uploading-to-the-scirra-arcade