From the rules:
- You may use any game engine/framework/language to make your game and build for any platform you like, including mobile. For mobile, only APKs can be distributed on itch.io.
- We do not accept submissions that require external games or software to run such as Roblox. Games that require interpreters (python, some interactive fiction languages, etc.) are allowed.
We don't have guidelines on what is required to be uploaded for a submission, but .zip files with game files is usually best for most cases. The game however must be hosted on itch.io (whether web or upload), not an external site to cut down on malicious links.