Adding more power-up items and in-app purchases

[lschmid83]

It would be great to include more power-ups similar to what is found in other platform games. Some suggestions are an item to enable flying, transforming into a giant character, a ghost who can travel through walls or throwing different types of projectiles. It could also be possible to monetise these power-ups, enhancements and different characters and costumes using an in-app purchase system.