Some things:
1) Take Rambo out of the title of the game. This has nothing to do with the 80s action franchise. It's a generic muscle-man running around, so yeah. Just 'Action King' would be better.
2) The gameplay isn't good. There is HORRIBLE hit detection. You may beat the enemy, or you may get hit and die without coming into contact. Your knife doesn't give you any reach advantage and you don't know where your knife will be connecting.
3) The sound effects aren't good. The grunting from enemies doesn't sound natural and your death scream sounds like nothing that would come from an 'Action King'.
4) This game needs to be played with an ad blocker.
Overall, this game is just too flawed to get into and is not worth playing. If you do try and play it, have a ad-block going.