Try Thinking about it as: "Less ____ is more _____" and fill out the blanks. it can lead to interesting stuff, like: less light is more power, or less speed it more jump force. try searching something you like.
How about this: Try to think of a scenario where you would WANT to remove stuff from something. Say, removing stuff from your boat to keep it afloat (Less stuff is more good, if you want to rephrase it to include the theme). Now think: "How do I make a game out of this?". And boom, there's your idea.
