Q. Game fails to launch on Mac OSX Lion on subsequent attempts
This is a problem with the resume feature of Lion.

Workaround 1 (AppleScript Editor):
tell application id “com.brawsome.jollyrover”
end tell

Workaround 2 (Terminal):
defaults write com.brawsome.jollyrover ApplePersistenceIgnoreState -bool YES

Either of these workarounds should allow you to play JollyRover v1.14 (using Lion v10.7 or v10.7.1).
Credit for this fix goes to Ben Rimmington, who originally posted this here.