Really simple concept... looks good except that I would get rid of one of the sponsors... it is a little too much and looks really spammy. I would also add some color to the logo. Other than that it is a good idea and should monetize pretty well.
I would say add a favicon and change the <title> of your website to something more appropriate. As for the adds, well thats would be me off, its just a blatant attempt to make money so i would deffiently say you should reduce or even take them off all together. Focus on getting people in first before you try and make money off them.
I think you need to do some small changes in your site to make professional. Just color the title and change its style. And also place the download button to the center of the site with additional effects..