Since an HTML5 game can run in linux, can i post that? I make games in Scratch and convert them to HTML using Turbowarp. there is an option to convert the game to linux application but i cant test it cuz i dont have a linux. Can i post an HTML5 Game instead?

You could try a live distribution like Knoppix to test it on Linux. 

https://www.knopper.net/knoppix/index-en.html

Would save you the trouble of actually installing it.

Hi! Primarily, this jam was created for Linux users, but I feel like it's also important that it is open/available to people who're interested in exploring supporting Linux from other platforms. Including a Linux build is a requirement listed in the jam's rules (and has been since 2017). Since that rule is a fundamental part of the jam's identity, I feel that it's important to stick with it.

That said, shipping a Linux build via a packaging tool and learning about the ins and outs of that/discovering and responding to any issues you find can be an important part of gaining the experience needed to support Linux, so I see that as very much within the spirit of the jam.

Hope that helps!

You can try using nw.js

https://nwjs.io/downloads/ select the linux one and then follow the steps of the second thread of this site https://scratch.mit.edu/discuss/topic/341387/

As controversial as it can be at times, you could theoretically ship it as an electron app. I assume it's not difficult due to its prevalence for traditional software that would otherwise not be on Linux. I could be wrong, so I'm going to have to look into it more. If it's simple enough, it's an option.

If you don't have a Linux distro installed, you can try installing one (i prefer kubuntu but it's up to you to decide) or find one that boots straight from a USB stick such as Knoppix or Puppy Linux. You could also ask someone else that has a Linux distro installed to test your game for you.