How can i show my game at jam? 

Should i leave tags/links or something somewhere?

Do you mean how to submit?

you have to make a new project add a name, upload game, etc.

then you have to release the game and come back here and click submit and select The game fill out any information needed.

you can make sure that it's submitted by looking at the games page at the top right it should say submitted to (jam name)...