added automatically pausing when leaving game card
added automatically pausing when leaving game card

dennis-park/OOGALoompas,kevinkdo/oogasalad_OOGALoompas,jordanly/oogasalad_OOGALoompas,sdh31/tower_defense,dianwen/oogasalad_TowerDefense,garysheng/tower-defense-game-engine,codylieu/oogasalad_OOGALoompas