This game is just awful. Jumping is the point of the game but the levels are so badly designed that even if it was just jumping with everything else taken out, it still would be difficult because the controls are so unresponsive.
Then there are the enemies. Why are that in the game? You have to ignore them to be able to make the platforming jumps but you get it by and you jump, usually to your death. And because there is a delay when you get hit to the forced jump you can't do the platforming and it kills you.
And why is the guy shooting? Him shooting does nothing. He's not hitting the enemies or adding suspense. It's just a small change in player character with a noise so annoying that you want to un-plug your speakers.
Finally, to login to a third party site to post high scores is the death knell of the game.
A badly thought out game, badly implemented.