In this Jam you get to choose from three main themes and ten smaller ones. One of the main three is required and at least three of the smaller ones (but you can choose more than if you want). You can interpret the themes in any way you choose, as long as it is remotely close to the theme. 

Edit: So I realized that ten themes is a bit too small for me so you can choose some of the bonus ones too if you want. And if you must then you substitute a small theme for a bonus theme.  

The Three main themes are: You Are the Enemy, Mountain out of a molehill, Whispers. change*.

The Ten smaller themes are: Ghost, Windows 95, Pixel Perfect, Sizes, Wormholes/Blackholes/Whiteholes, Sound Matters, Sanity, Hollow, Body Switcher/Shapeshifter, The 4th Dimension, Paper.

Bonus Themes: illness, Fog, Temperature, Darkness, Of two (or more) minds.