That's actually true. I have a parameter for the range of the weapon. I think it was set to a 100, but the entire map has a radius of 50 aka, you can hit all the enemies. I should add something that forces the player too move more. I already increased the player detection on the enemy AI, but that's probably not enough. Maybe the platform slowly fades away so that you are not able to continue standing on it.
And yeah. I did not come around to making some sort of reward when all enemies are killed. I was thinking that I could respawn enemies and amp up their detection radius so that the game would get increasingly more difficult.
Thanks for the feedback!