I feel like this could be a cool game with more time spent expanding it. I really liked your moon worm sprite and animation, and the sound clips you made. I wished there were a few variations in the sound clips, because obviously they do become repetitive. I was hoping something would happen if I managed to eat all the astronauts on screen, so adding something of a goal like that would a good way to expand here. I would have also liked to see the edges of the world handled a bit more, since when you get quite big you start to see the edge of the moon texture. Even just making it huge or scale up as the worm does could help there. Overall, still a nice cohesive little moon vibe and I enjoyed eating tiny space men. Nom nom nom. 

I think it has a lot of potential but there are a few things to polish that would go a long way: the background texture doesn't match the art style very much and it doesn't tile cleanly, some screen shake when you eat people would also help, Id like to comeback to see an updated and more polished version, keep it up