I used to come to this site all the time and i remember playing one game in particular. I don't know the name but i know that you played as a tiny white figure with hands but no arms and you could use tons of weapons and killed tons of what i think were cia or something. I remember that you controlled his body with keyboard but his hand was controlled by the mouse. If anyone could help me find that game I'd be really thankful.

With that description I think of either Thing Thing or Madness Combat though I'm not sure if Madness Combat had a game.

This is most likely the game you're talking about, the Thing Thing games.