Air not Required when swimming  -  Press Down, Down, Down, Left, Right, Down, Right, Up, Right, Right at the first start screen. 

Alternate Costumes  -  At the main menu, quickly press Up, Up, Down, X, Triangle, Circle. 

Beat the game faster  -  After you do everything you need to do to go to the hub and kill evil blasto. Then all you have to do is go backwards from the hub and take the door where those conveyer belts are then follow the path their should only be like 5 enemies 

Do Not Press Buttons  -  Beware of the DO NOT PRESS button in Episode 1. It will nuke you! But press the DO NOT PRESS button in Episode 2 because it creates powerups! 

Extra Life in Episode 2  -  In level 2 you can get a life by going through the level until you get to the part where you press the button to Tube 1. From there, proceed straight until you come to a locked exit door. Turn around and get the powerup, then press the door button to unlock Tube 1.

After that you must get the gun across the platform and then go UP to the spinning platform (not on it.) You should hear the powerup sound. Turn around and go towards the button that unlocks Tube 1 and stop BEFORE the edge facing the button.

Jump onto the jumping platform and press JUMP as soon as you touch the platform to get on top of the button room. It takes a little practice, but once you make it you'll see an extra life balanced on top. 

Extra Lives in Episode 1  -  Get the Jet-Pac then go back to the covered walkway where you started the level. Grab the Extra-Life above the PORT sign, fly along the top of the covered walkway to grab another, then another atop the dome, another atop the sign to the left, then one more behind the tail of the rocket. 

Have all weapons  -  After you beat the game, enter this code at the start/options screen: Up, Up, Down, Down, Right, Up, Right, Down, Left, Left. 

New Options  -  Beat the game and get every babe. Then you can check them all out in a new option 

Play as Evil Blasto  -  When you beat the game enter this code at the start/options screen: Up, Down, Up, Down, Left, Right, Up, Down, Right, Left. 

Powered up gun  -  At the main menu press: Right, Up, Down, Left, Down, Left, Right, Up, Down, Right 

Secrets 

Episode 1: In episode, in the beginning you know that babe on the faraway platform, well to get her you have to go through the whole stage. When at the end turn around walk back to that brown astroide and will see a jetpack, on the other side three lives. Now go back to your space ship in the beginning and go to the back thruster and there is another life. Go by the sign that says "WELCOME TO URANUS" and fly all along there and there is at least 5 or 6 lives there too.

Episode 2: Eventually you will see a pear head carrying a newspaper in his hand. Follow him. When he goes to the toilet, blast him away and you will get a gun and extra lives.

Episode 3: Somewhere in this level there will be a big gap between platforms. There should be 2 lives floating in mid air. If you look closely the stars form steps to a platform full of lives.