I am sorry to hear you couldn't finish the game, I tried playing through the game again (browser version) and nothing went wrong after the fake game over animation. You're meant to not be able to control the egg before the animation but gain back control after the speech bubble comes out.
- which version of the game were you playing (Mac, Linux, Windows or browser)
- were you pressing the left/right/a or s keys when this happened (there is a glitch where mashing buttons causes the egg to keep moving right or left)