This reminds me of simple electronic toys! I played through the story mode, and then much later I played through the non-sighted mode, without looking at the screen (actually really fun!)
The jokes made me chuckle. I enjoyed the frank references to world events, the slightly off Vader and Queen songs, and the goofy idea of Game Boy heroes having created a secret weapon. I'm glad your town will be safe if asteroid Vladimort P crashes into the Earth (possibly in a few hours?) The images were all very nicely optimized for a Game Boy screen.
Thanks for showing so many people what their games look like on real hardware. I've been inspired by you! Here are some picture of your game on a GBC: