I enjoyed the game, the sound, music and visuals were definite on point for Gameboy. Great job there. Was an interesting combination of gameplay as well which added some variety. I thought at first it was just going to be add more slimes to the first game mode, but then we got a new part of the game which I liked, well other than the one potential issue I hit.
The one issue I ran into was when flying through space the sprites for what I think were the slimes were a bit difficult to see, seemed like they were rendering as cut off, or maybe they were blending more in the background, not 100% sure.
Thank you for making the game. :)