Waiting in a queue or perhaps whiling away 5 minutes until dinner, a casual game often fits the bill and this is the classic (if trivial) card game of Higher or Lower. Do I even need to explain the rules?(!) You get three 'lives' and then it's just a question of how lucky you feel!
Of course, you can turn this into an 'app' yourself with PAWA or just pin it 'as is' on your Start screen. It's up to you. If you're confused by the different PWA options then check out my feature here.
A perfect little game to while away a minute here, a minute there, here's Higher or Lower PWA in action:
You know the game - can you 'feel' the next card intuitively? Or will you follow the maths and odds?