It is a bit vague wether or not you can still edit your game after submitting it.
This has lead to me waiting until the very last hours to submit my game. I could easily see this going wrong!
And yes, lots of it went wrong! lol
Hey, sorry this was confusing. This jam blocks new files from being adding to your project page only during the submission time. You can submit early and continue to upload files up until the submission deadline is over.