Wow, it's been a while since I played this game. This game has lots of flaws, but this game has some decency in it. Surprisingly, I noticed it as a little kid. I'm going to start with the flaws.
First of all, when I lose all my lives, it just cuts to a black screen. Secondly, I know this is the pixelverse, but why do the backgrounds have a grid? In my opinion, it looks ugly. Also, the environment looks okay, until you look at them close up. The textures for the stone and dirt don't belong. There are lots of glitches in the game as well. Most of the animations in the game don't look natural, it looks choppy and motion tweeny. Gyro has Homer's voice. Finally, you didn't credit who made the music or said what the music is.
I think I got all the bad stuff out of my system. So now lets get to the positives. Firstly, music choices are great in my opinion, I'd use the music if I knew what the music is called. I actually like the graphics in the game, like in the main menu, the text you use, and basically whenever you draw Gyro close up. I like how the settings just seem random, it reminds me of my childish imagination.
If I were to give any recommendations to make the game better, I'd firstly give Gyro a gun to shoot the atoms, it would add a little bit of realism and would make Gyro look more like a badass. Secondly, if you fix all the glitches, you can make the game harder by adding more enemies so the atoms are more useful. I'd also give an original voice to Gyro, for originality.
Overall, in my opinion, it's not as bad as how the others say it is. But it still needs fixing and better backgrounds.