Nice concept and I liked the art style. Plays well. I would say that I didn't quite get the heated egg thing at first as there's a lot of text explaining everything at the start (and some of it obscures the gameplay so maybe move it higher or over the landscape parts.
Would be nicer to spread out the tutorial so you learn one thing each stage, starting with the sun hitting the egg. A bit more feedback on the egg being heated would be good, even just flashing it. Some blue sky gradient backdrops to reinforce that it's the sun up there?
I found the platforming a bit slippy for my tastes, with a lot of sliding, it is nice and fast though so maybe just tone down the sliding a bit?