All the rules are on the main jam page. If your game is selected then there's a high chance that we will invite you to work with us, improve the idea and help publish the game you made if it meets the standards! Is there anything else that you would like to know?
Yes of course! The theme is Hypercasual. Look up hypercasual mobile games on the play store/app store. You will get an idea. It's basically casual games with one touch control mechanism that are easy to play and very addictive.
Well no one can know if you made the game in the required time frame or started before. You can cheat, but it won't go well with the spirit of a game jam :)