Yay, I was able to beat the game! Some recommendations: Movement and grappling could use a bit of tweaking. It was a bit difficult to get around the world. I also wish that colliding with the birds (and fall damage!) was more forgiving, as it's quite easy for your entire health to instantly deplete from one bad move.
I really liked the hand-drawn style, and the environment was colorful and vibrant! At first the game was very difficult for me, so I decided to skip the coins. Oops! Turns out I needed them. But after getting to the bottom, I was more familiar with the controls and movement so it became this game about patience and tricky maneuvers. Great work!