The bad - no screen wrap, bird can disappear behind tree, I think the berries should be a little bigger to hide the white behind them, can't see a score, and would have liked to hear a chirp sound when bird get close with berry, when hit an acorn I didn't respawn, when click the fullscreen it is not fullscreen, and I feel that there is not enough holes on screen at once near the start causing a lot of waiting rather than moving (this does start to get more as progress though which is good)
The good - I might have mentioned a lot in the bad but the good far outweighs the bad, I promise. This is a really nice game and there is a lot that I like about it. For instance, I like how there are letters behind the berries, that's really clever, also really like how you can jump over the gaps sideways and jump up to next platform with ease, controls feel natural, overlapping holes are well done, music is good, the artwork is great, like the fact you got acorns to dodge and a way to recover your health, and I especially love controlling the bird as a main character and like how you have to have the goal of feeding the chicks who look totally awesome in their little nest. Overall, it's a really well thought out game that feels good to play and with a few tweeks it'll be close to perfect