Merge pull request #46 from georgexzeng/master

refactored code and oojsed
Merge pull request #47 from georgexzeng/master

updated game balancing
add level select state(currently empty but for one button), redirected from menu appropriatley.
Merge pull request #48 from garrettdalton/master

add level select state(currently empty but for one button), redirected f...
about us on index.html
Merge pull request #49 from CothOmega/master

about us on index.html
incorporate fixed polar sprite
added multiple maps