- Added pause game when Home button is pressed in the Game Over Screen
- Change hit box for bomb when we have shield.  To make it bigger in
  shield mode.
- Decrease the coin spawn rate by 25%

Signed-off-by: Hin Lam <max21226@Hin-Lams-iMac.local>
Merge remote-tracking branch 'max21226/GA_March1' into rotato_master