Ball update

I finally figured how to refactor my code to allow for more balls. Turns out GDevelop does allow you to group objects together which I didn't know, I figured I'd have to create and use my own behaviours which took a few weeks just to understand because I'm a slow learner.

Bugfixes/Changes

1. The mute button should mute and unmute properly now.
2. Improvement on the level design and probably the last, I made it so the game was very easy early on with most platforms now featuring slanted edges to prevent the ball from falling off.
3. The title screen now lets you select a ball using the mouse, but you can still use the numbered keys.

Additions

1. Added a whopping 7 new balls, each with its own quirks: a bowling ball, a red balloon, the Bludger from Harry Potter, a bouncy green ball, a basketball, a volleyball, the ominous $Ph€r3.
2. Added chaos involving one of the balls.