TIG is absolutely right. it's a fun puzzle to solve. I might add, you've given yourself some basic parameters, but the real trick is to see figure how you can get all of your needs in as little square footage (meterage?)as possible. Most people tend to way overbuild because they think they need a lot of space to do relatively few things. Try and figure out how do make spaces do double or triple duty. Dont think of a room as only having one function. (case in point. .. dining rooms!) Have fun and Good luck.
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Darn. . .I would've really likee to see the cartoon character thing in there.