Great work on this! The art was simple but effective, the premise was really interesting and I enjoyed the boss fight at the end -- thought it was especially cool that you could fight it at the beginning but basically get your ass kicked, definitely makes you feel powerful once you come back with more abilities. The post-death messages were a little too long, especially after you've read the text (a skip button would be nice), and having a better indicator for how much DNA you had would've helped as well.
This are just small details though. Overall a really solid entry! Good job!