According to the FAQ in the discord, a reupload to fix bugs and errors is allowed during this time as long as you don't add extra features. I had to reupload mine after the deadline because some people couldn't download it. I'd love to be able to finish the game and see the rest of it.
Viewing post in Skullz Factory jam comments
Thank you very much for informing me about this rule, I was completely dispirited upon learning of this singular mistake which blocked off the last 7 levels.
I have uploaded a new version which resolves the issue. To confirm that each level has a solution I have played through the game from start to finish, some levels are tricky but all should now be solvable.