Implemented every feature from easy to expert.

I tried to create a health bard with hearts instead of just displaying a number, although it is not as optimal as I wanted. I wanted to render a heart for each life the player has, but ended up with just enabling and disabling each heart manually in the end.

I also wanted to add some sound effects for when the blade is active, like a sword wooshing sound effect and a slashing sound effect when an object is destroyed with the sword mode, but decided to just move on.

Lastly I wanted to make the music volume the same when starting a new game, but couldn't figure out how to, so that's something I'll need to learn later.