Changed placeTower to use constant
Changed placeTower to use constant

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