I felt that the game was too short and there was no boss. Around level 22 I was starting to have a headache so I turned off the sound. Other than taht, good game. 4/5.
Got to 4.1 K and i was in a long tall building, i jumped before the edge, and there was a little building and i didnt even touch it. But i love this game 5/5
Its easy to get the hard achievement.
I was just using the M-198 and was only getting headshots, there is an ingame achievement called shotgun sniper , it gives you around 1000 points, its easy.