Very well done. The primary gameplay loop is surprisingly complete, between feeding the babies, protecting them from snakes, and defending yourself from the hunter.
The music and graphics are a nice nostalgic reminder of the early 8-bit days.
My one complaint would be that it took a bit of effort to figure out how to play. I know the information was flashed across the screen, but it was all too fast. In particular, I had a lot of trouble staying aloft until I figured out you could just hold the spacebar (don't need to keep spamming it).