At the start of level 1, when you go up the elevator to close the blast door, allow some field troopers walk into the bay on your right. There is an activation panel. Hit it, and a giant A-Wing will appear from the bay's ceiling, fall on the field troopers. and create an explosion.
Better Force Push
This trick will allow you to push an opponent farther by pressing F without having to target him. Target your guy with Force Push and push him once. If he is in your sight you can repeatedly press F -- the targeting box for Force Push will not appear and you can still push him. It will also be a more efficient way to kill your opponent with this Force. Although difficult to master, its very useful once learned.
Codes
(For these codes, all you have to do is enter the control panel by pressing the letter "T" during the game, type in the desired code, and then "Enter")
Invulnerability: boinga 1
Uber Jedi: iamagod
All Weapons: diediedie
Full Inventory: gimmiestuff
Force level up: trainme
Fly mode: freebird
Full Mana: trixie
Skip Level: gameover
Freeze enemies: statuesque 1
Slow mode: gospeedgo