If the physics on the breakable blocks were fixed, I could recommend it. Plus, level 9 was cruel and I can't figure out how to get the egg on level 10.
Is there a stage select for replaying levels to get missing eggs?
Hey, thanks for playing and your feedbacks!
I'm sorry you had some troubles with these breakable blocks. Normally if you hold the jump key you can even pass on top of them without the need to break them in situations where you have two blocks and enough space above them.
To get the egg on level 9, you need to go on the top platform to perform a long jump and get the egg while in the air.
Here is a screenshot with some explanations:

To get the egg on level 10, you can dash first and jump while dashing and collecting the egg. Something like this:

I hope this help you out.
No, there is not a stage select screen yet. I did not plan that feature to be honest.