Thanks for the detailed feedback. I've implemented a bunch of improvements already but didn't want to update it during the voting period.
The ui/ux is easier to understand. There is a time based score that's displayed on the screen and a high score tracker that saves between sessions. I've added a background to the play area as well.
I'm polishing the animal graphics and sounds a bit as well. I've added a "death screen" with stats like "animals eaten" and "water consumed" and stuff like that.
I'm adding a pause function/screen.
I plan on pushing the update out tonight or tomorrow.