Bounding box issues make this game more frustrating than fun, especially when it comes to the anti-logic first boss with his impossibly efficient square wheels and ability to float over holes.
The color scheme similar to the old brick Gameboy is cool, but not needed. It could have easily been in NES or Gameboy Color style.
The spike enemies seem more like robots than 'critters', and should have only been dangerous to land on. I am really getting sick of the spikes-are-dangeous-from-the-side oversight that is far too often made these days. And I don't want to hear 'That's how it's always been' or 'It's so much work'. If it could be done in Sonic the Hedgehog and countless other classics, it can be done anywhere else. Leaving spikes deadly from the side is just plain lazy and annoying.
Health power ups would be nice. If there are, I didn't find any before giving up. I would hope you aren't expected to go through the entire game with 3 hit points. One before the boss would make it more bearable, or at least a more forgiving bounding box so that I'm not taking damage when my robot's pixels come to close to the boss's top front corner.
The bounding box of the player character in any game should be as small as possible. I even recommend making it smaller than the character sprite in most cases.
Some context to the opening cut scene would have been nice. Why does everyone hate him? He couldn't be that much different from the others. He's a simplistically designed robot.