I was thinking about doing it in Roblox, is that cool, or is it not allowed?
Can you still post the project to Itch if it's made in Roblox?
I can send the game link here, but it's on Roblox, you just need to download it and create an account to play.
i can set up an itch.io page with a direct link/redirect in an HTML file or a .zip file with the launcher link. Many Roblox developers submit to itch jams this way.
That sounds fine then. If it has an Itch page it can be properly linked into the jam and counts as a proper submission and such.