The first thing you should do is summon the Archangels. (While you can summon Archangels in single-ball play, you can't get a Super Jackpot after summoning them; that's when the features score the lowest.) Summoning Archangels not only leads to Genesis, but awards various benefits.
Note: Choose carefully which Archangels you summon!

It's important to use left and right side nudging to get a high score in Angel Egg. This is necessary to control balls falling from the upper floor, as well as reviving kickbacks, and summoning the Spirit of Water. As in all pinballs, the flippers are essential, as is the combination of sling shots with nudging.

Even after you've summoned the Seven Archangels, it'll take all your concentration, daring, and skill to reach Genesis. You may find words like "strategic" or "precise judgment" in Angel Egg's manual -- but just as often, when there's no time to think, you'll need pure instinct and reflexes. The right balance of enthusiasm and cool judgment will enable you to reach Genesis. But even reaching Genesis doesn't guarantee a high score. What is the key to that? Indeed, what is the secret of climbing the last step of the stairway?...
Angel Egg has a lot of unique features.

A complete PDF manual is available for download.