I loved it. This is the most fully realized game of the jam I've played so far (about 35 games).
Top to bottom polished and functional. I particularly liked the zoom into the Gameboy screen to start and the comets in the background. Just lovely.
I have only have a couple notes and they are pretty nitpicky (which means you killed it)
People have mentioned the clicking to shoot. I agree, a key would feel better.
Also the walk sound played even while standing still.
And, it said I won, but I have no idea why haha.
Other than that, perfect. Well done. And thanks for making it!