Added Game Over menu
Fixed build tower buttons after new game
Merge branch 'Oskar'
Added game over controller and listener
Merge

emote-tracking branch 'origin/master'

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Created a Game Over method
Merge branch 'master' into Oskar
Implemented GameOver alerts
Implemented Game Over logic
Merge branch 'master' into Oskar
Game Over
Fixed bug such that only one died event in mob is sent