See my guide under the "Master of the Worlds" achievement for a full guide on how to complete all 4 Episodes. :] Happy gaming!
You must note that if you do not complete ALL combinations listed under Episode 1, you will be unable to complete Episode 2. Just because you get the achievement and cut scene for completing Episode 1, that doesn't mean that you did all elements available in Episode 1. Make sure you've completed all of those combination before starting on this list.
Episode 2
void + glass = light bulb
void + electricity = radio wave
light bulb + radio wave = tv
tv + book = computer
radio wave + radio wave = radiation
metal + radiation = plutonium
plutonium + weapon = nuclear bomb
computer + radio wave = cell phone
energy + fire = plasma
plasma + void = sun
sun + grass = flower
sun + flower = sunflower
tree + flower = apple
sand + tree = palm tree
seeds + energy = coffee
void + airplane = rocket
Void + rocket= Satellite
Radio wave + fire = laser
laser + book = cd
metal + water = quicksilver
quick silver demigod= philosper's stone
Apple + cell phone = gold
human + computer = cyborg
computer + computer = internet