Well, it needs a lot of work. Here's my input:
1 The stage size is quite strange for a web-based game.
2 I couldn't help but notice the Times New Roman font
3 Your instructions say to press SPACE to jump, but I found that I had to press the up arrow.
4 The first level should be a bit easier.
5 The graphics are 'Atari'
on the positive side, the humor is good. When I saw the title, 'Going Commando' it really piqued my interest. the basic concept is there.
Any way, good idea, and nice job, but today most computer games are built with a team of developers. No doubt you will soon be at the level you need to be to compete.
Not so, the 'casual game' industry is booming thanks to mobile phones and devices. Many, if not most, of these games are developed by a single designer. Look at Tetris - still popular and a good programmer could whip that up in an hour or two.