i have no idea, a rich theme that embodies what im doing ingame is always a big plus for me. to me theme holds more weight than any story in a video game and usually complements the game play more.
a message or meaning is a bonus, i like putting that kinda stuff in my work because i feel like i do it in a way that unfolds like the game itself.. the meaning of the game is a little puzzle to solve if you feel like doing so.