Absolutely love the art. Just unbearably cute lil frog. The rest of the art is also excellent and is super readable. I never felt like I couldn't understand what I was looking at and each situation was conveyed clearly by the art. Excellent work.
Regarding the gameplay, its simple, effective, and easy to grasp. It is fun, and I was able to complete all 8 levels.
As far as feedback goes, I think perhaps the hitboxes on the birds are a bit too unforgiving, and could stand to be a bit smaller.
Really well done.