Today We Did
1. if the tank and enemy bullet collide, then make both of them disappear and switch the game_mode to GAME_OVER 2. if player_shield and enemy bullet collide, the bullet should disappear. if enemy_shield and player bullet collide, the bullet should disappear. 3. play "assets/audio/Military Tension (Loop Version).wav" as background music 4. when bullet and wall collide, play the sound "assets/audio/hit1.wav"