Each is available on iOS -- Apple's mobile operating system -- and are thus in the App Store, with both Dark Dot and Snap Escape being free:
It's GAMBIT, so, while you're having fun, try not to think about how awesomely you're helping the Singapore lab answer game research questions. Don't think about: shape manipulation features, intuitive tilting controls for your iPhone, or using games to provoke awareness of environmental issues.
You've been warned.
Now get playing...