Merge pull request #6 from epace/master

asdf
add a second heart
Curiousity Track Loop
add weirdo connection physixxx
resolve merge
gravity again
Add items
no really add items
add wav
different approach to hearts, add gameover
Merge pull request #8 from rdkoehler87/master

mp3s
Merge branch 'master' of https://github.com/adamsmasher/heartbeat
better heart movement
fix merge conflicts
better gravity
blah