how does the playing games per minute for coins work, sometimes I'm in game for like a half hour and it says I played only 5 minutes, even though I'm in game doing game things, just maybe not rapid fire because life gets in the way

some games are different, some don't require much activity like solitaire and others need a lot of activity 

the games that require activity will send a notification as a reminder, like,

"Hey, are you still there? Continue to play to advance to get rewards. 

it's kind of what it says, 

check out solitaire classic game if it's available for easy coins