As it is, many players play only hard enough to achieve the minimum cutoff. It's mind numbing and boring when you're focused on only getting 70 snacks in the Maze, or only getting 2 bullseyes and a red ring in Cannon, or only getting 300,000 points in Gobbler, or keeping it over 40 seconds in Ninja Pig. How about some incentive to play harder? (I also want to note that the Way of the Ninja Pig game offers huge challenge but offers very little experience for the emotional strife you go through.)
Increase the experience that you can earn per game to 6, or maybe even 7. But don't give out those extra 3 points like candy, make them appropriately hard to get. Maybe you would need 105 snacks in Maze, or 3 bullseyes in Cannon, or 700,000 points in Gobbler, or over a minute in Ninja Pig.