What the developer should do is make it so that you can kill the blue guys by touching them in the back. But you can only kill all but like 2. It would make it more challenging because the more dead bodies the more alert stages there would be. This is my suggestion to the developer. Hopes he reads it! :P
This game is my favorite!!! There is barely any if not no game like this!!!! 5/5 10/10 ect. ect. Also be sure to check out my profile beware the apoclypse!!!!