Yes, those marks around the word “game” were intentional.
According to the Creative Director at Media Molecule, it looks like they have plans to reveal their next project sometime this year. What’s curious about the Tweet, however, is that there are quotation marks around the word game, which could mean anything really, but if we know Media Molecule, they tend to make “different” games.
This years list; • Finish C64 game • Finish Concept Album • Reveal New Media Molecule ‘Game’ • Destroy Candy Crush Saga Inviters
— Marcos (@marcoshealey) January 1, 2015
What I mean by that, is their games are more about creation than being a traditional game, so maybe they’ll be taking that route once again with their latest project, or maybe it’s something totally unexpected. Guess we’ll just have to wait and see.