@Skrymir- The Boss at the end is Hades "god of the underworld" so yeah he should be hard because he is suppose to be a God. Btw, he really isn't that hard
lvl 7 is easy all that u hav to do is to let the guards find u in the beginning of the lvl let them follow u and go around in a circle to kill the green guy
this game is awesome but it would be funner and more challenging if the guards follows the blood trail you leave after youve killed the target and be able to walk when you invisible...but it should cost more energy to make it harder and btw......i think level 17 is harder than level 18 lol.....level 13 is my favorite because its so easy haha excellent game 5/5