TL;DR: The menus are slick and well presented, but the game itself isn't fun or pretty to look at.
The good:
-Menus are slick, intuitive, and responsive
-Chicken pixel art looks good
-You can into a game really fast fast
The meh:
-Unclear what the differences between chickens are until you test each one
The bad:
-Movement feels awful because chickens accelerate way too fast
-Since worms aren't autocollected, the optimal strategy is to always be mashing the eat button
-High scores are unreliable because of how random worm placement is.
-The playfield is ugly, and it seems like there's only one a level
-Most of the play area feels like it's wasted space, especially since there are only ever two objects on it.
-Music loop is too short, and gets annoying quickly
How to fix these issues:
It feels like this game has two games it wants to be, but instead of doing one well, it does both badly.
Either:
make movement slower and more precise and slow down the hunger bar
This means that the peck to eat mechanic rewards skillful play more, and makes game mastery satisfying. Have new levels at the edge of a new player's average skill level (in the current game, that's between 1500 and 2000). If they don't get to see it, tease the level in the game over screen
or
make worms autocollect, and turn the careening chickens into a feature
Add more worms to the play area, so that missing one is less of a big deal. Then, add absurd elements, power-ups, or the like, so that a casual player can get good and have fun as fast as possible
Then
-Make the background more colorful, and change it fairly often
-Make the main music loop longer, and add better audio cues
-Add visual cues for eating a worm
-Spawn multiple worms, some closer to the player and some farther away. The farther ones are worth more points, might grant power ups, etc