Much polish. Wow.

It's been a bumper day for features and polish. I added volume controls (for music and sound effects) to the settings screen and pause menu. Also added a damage multiplier slider, so you can reduce the amount of damage you take when colliding, if you prefer a more chilled experience. 

I also added a bunch of sounds, and worked on music (but I haven't added any music to the game yet).

Getting close to release. I CAN FEEL IT!