Nice game!

bird looks cute, I had restart over and over because of jump limitations , you could automatically restart when jump energy goes zero to complete ?

The tiles looks destroyed.

It's a great game! The movement does fell a bit unresposive and if I am moving into a wall the jump height is almost nothing. Otherwise it's fun!

Maybe a UI telling the player how to restart would be a bit helpful cause I had to relaunch the game every time I had to restart until I saw the controls on the game page. But it's still fun!!

Good Job.

Nice to see a pico-8 game here. I've been making a game using the same engine which I plan to release soon! I liked the little character. The jump effects were nice, but sometimes I get stuck inside the ground. Your game would perform amazingly if you used unity (just a suggestion, colliders work  way better here).