I think you have a pretty solid foundation for a good game here. My biggest gripe is just how much the player has to click. I think the amount of times the player has to click in order to get money for upgrades definitely needs to be toned down as it becomes more tedious than engaging. I also find it odd that you allow players to turn off the flashlight seeing as it makes it harder for the player to see what the enemies are able to do. In any case, good work on the game!