You must use "at least" one of the following assets for 2D or 3D:

For a 2D (or 2.5D) game :  
https://kenney.nl/assets/tiny-dungeon
https://kenney.nl/assets/tiny-town

For a 3D game:
https://kaylousberg.itch.io/kaykit-dungeon-remastered https://kaylousberg.itch.io/kaykit-adventurers
https://kaylousberg.itch.io/kaykit-skeletons

You can use any other asset that you legally own and have the right to use; any framework or template is also allowed (and strongly encouraged)

Explicit sexual content is prohibited, keep it 'friendly'.

The Organizers