After the elimination round, the 3 final themes to vote on are: Exploration, Colors, and You Are Not The Hero.
Themes are always up for interpretation,but if you want an idea/explanation of what I immediately thought of
Exploration - Could mean physical exploration (space, a forest, your backyard etc.), or exploration of feelings, etc.
Colors - Could mean colors are part of the game mechanic (e.g. Color Switch), maybe a monochromatic game (that isn't black/white), or just a colorful game
You Are Not The Hero - Could mean that you are not the main character, or maybe you are the bad guy
However you feel about these ideas, go and vote for the one you want so we can get to making a game!