This is a great game and reflects a ton of the people who just rate down for stupid reasons.Even though i never bother to comment/rate on a game unless i like it,I can see what was "I" saying if i did bother.5/5
Oh and just a tip,since all fps games are short in single player because they are multi,you should give us a mission maker to do.Or some multiplayer missions would be cool.
Not a good game,seriously, you should have tested the levels.Few levels are sorta creative,others(95% of the levels) are solved by just spamming dummies.
Few suggestions.
1.Auto reload
2.More maps with greater and smaller sizes
3.Weapons.
4.More than one game mode.
5.Crouching and crawling.
6.PLayer customization.
7.Level up modes.