Post jam fix and additions

This is (probably) the last time I'll touch this game, some levels have been added, some to explore new possibilities and others to better introduce some mechanics. 

The game now makes use of the full palette provided by the artist, which consists of three themes:

Grass theme

Blue theme

Purple theme

Also now you can check whether an orb can be hit by hovering the mouse over it!

Some levels have been redesigned and others have had their difficulty curbed.

Now there's also multi goal levels!

The final level has also been fixed, it had a design flaw where it was easily cheesed by bouncing the ball against the wall. It's now also less dependent on timing and has better margin for error.