Code clean-up.
Merge pull request #10 from michaeltirenin/master

added audio stub
Merge pull request #11 from thesubway/master

Code clean-up.
Health bar aligned with art and changes color
Merge remote-tracking branch 'upstream/master'
Merge pull request #12 from pavedwalden/master

Integrated health bar
Add basic depth limiting
Merge pull request #13 from pavedwalden/master

Add basic depth limiting
Add ocean background grid and scrolling
merged alex's code with Brad's
updated ocean background, waves, and clouds