I did so many iterations of the illustrations for this game. All of them are really more "print" than "handheld game", regardless of how they're framed here. Not being a huge hand held game person, I do like to remind myself that "Interactive Media" does include printed books.
These are the more hand held-ish ones. They don't have more of a "digital game" feel, but I've framed them that way. There are lots of electronic games for kids that use a quite flat illustration style, for example these SagoMini games.