Unfortunately, I don't like it. I'll tell you why. I think it's really pathetic if the main character is a simple square. Or a ball, or maybe a little bloke, Or something else that requires zero graphics and animation. Maybe there was one exception, Paradroid. If the main character was a player, a little boy or girl, the game would be pretty good. But this story about him being a pixel... oh my. One of the most important parts of a good video game is the protagonist, the playable character! If that's not good, the whole thing is not good.
By the way, the idea of having the story take place on screens of another video games is great! The music is good! The playability seems fine by watching the video. Good luck with your next games!