It isn't the easiest thing to pull off, but charm can be a powerful draw for a game. It can leave players with a sense of bliss that transcends the gameplay itself, and inspire them to frequently return. It's exactly why I play Kirby's Adventure for the NES on a regular basis. It's fun, sure, but it's also endearing. Mr. Dreamer has a similar hook to it, and I'm already convinced I'll be firing it up for months to come.
I'd like to clear the air before we get started: Mr. Dreamer is in no way related to Mr. Dream of Punch-Out!! fame. He's less a fighter and more a runner, as you'll quickly pick up on in the game's trailer and enclosed screenshots. But don't go assuming his journeys are of the left-to-right variety. No, he's a little more interested in fighting his way upward.