I actually quite liked it, reminds me of the very first game I made with Game Maker. There's one thing I'd change and that would be to make the solids larger in the first level, the artwork isn't bad ya know, some people don't have the stuff to make great graphics, whether it be skill or lack in software. Not many people appreciate small games like these, but I do!
Also, I have my laptop on mute so I can't comment on the soundtrack.