Nice idea and cool game for your first time using unity! Some feedback for you, if the bat collides with the player you lose 1 blood just like you do when you shoot, but you can just stand over the fountain and spam e and wait until the bats collide with you and never lose the game this way, maybe add a blood-drinking limiter or the player loses 1 blood shooting but if a bat collides he loses 3
overall nice little game