Merge pull request #98 from jocelynlih/paul

We only have one enabled level and disabled level buttons are no longer clickable
Merge pull request #99 from jocelynlih/paul

When working on creating a screenshot for the Advanced Effects chapter, ...
Fixes for saving score and adding playground
Merge pull request #100 from jocelynlih/ankur-saving-score-fixes

Fixes for saving score and adding playground
Fixing join method and alinging the score shown on the screen
Merge pull request #101 from jocelynlih/ankur-score-fixes

Fixing join method and alinging the score shown on the screen
Updating Readme and screenshot
Add SteveDieParticle to game.
add particle effect to steve.
Merge branch 'master' into jocelyn-actionsForGameEnd
Use smoke particle effect.
Merge pull request #102 from jocelynlih/jocelyn-actionsForGameEnd

Steve die actions for game over
Add HomeScene and let Steve run on home screen to add more fun.
Merge pull request #103 from jocelynlih/jocelyn-addHomeScene

Add HomeScene and let Steve run on home screen to add more fun.