itch.io

Short answer: you can change the page, but not the game

Locking changes to submission files

For ranked jams, jam hosts can use the Lock uploads option to prevent participants from adding or changing the files on their page during the rating period.

The lock is only active during the rating period, after the jam has ended submission owners are fee to release their post jam builds. Additionally, if the submission period is still active, files can still be changed. Submitting early will still let you publish updates right up until the deadline.

Participants are free to update their submission page design and content while their files are locked.