First update of major changes

Worked on few major changes to make the game more interesting. More changes and content can be expected in the future.

Most notable changes so far:

• Balls don't spawn from your charecter anymore. Now you must pick them up from the corners on any side.
• When ball fully leaves the stage a new one will spawn in its place.
• Stage design changed to indoors bowling alley to give more "classic" feel. Got ideas for more different stages in the future.
• Added exp system that lets you get more balls on level up. Not a huge variety of perks for now though :(
• Removed some of the less interesting special ball types untill I make them more exiting