Some ideas

it would be cool, if the game could be connected with HealthKit. Like walkr, use the steps to boost the time，or something. For example, use theprdometer data to keep the person awake in the night. One step for 2 second game time maybe. This makes more fun, and encourages us to do more outdoor activities. This feature might attract a lot of females. Or on the other side, gamer would choose to pay for the extended day time:-) By the way, the icon is a bit ugly. Check the top apps nowadays, there icons are more simple, and stylish:-)

TschernCC about Junk Jack, v2.3.1