I thought it was pretty good, if a little short.
I also thought the intentional use of the background glitch was a brilliant idea, even if the execution was a bit underwhelming. I got inklings of a system that is failing all around, like the Matrix glitching out, or Leela under attack from the compilers. But, there are no signs of failure anywhere else. Where are all the mismatched edges? The haphazard jumbles of sprites? Small little backgroundless regions here and there? You could really take this somewhere and make it a compelling concept, but as it stands it's just a level with a mapmaking mistake and some text to cover it up by saying, in effect, "Oops, I, er, I meant to do that! Yeah, that's it!"
You might not think the criticism is fair because it's just a quick experimentation, and I'm making it out to be more than it was intended to be. But, you asked for feedback, and I meant it to be constructive. I'm hoping you take the idea and run with it.
I also am personally not a fan of hiding things that are necessary to complete the level. That's a penchant of puzzle games, but not, typically, of adventure games (and certainly not of schmups). That's just one man's opinion, though, and there's room for others to disagree.