If I were a God I'd be the Source--an infinite supply of energy for beings to create and catalogue their creations, but only I hold the power to destroy/take it back.
I'd first create a dream reality like What Dreams May Come that is the true, base reality and Earth or the ''mortal plane'' is the illusion. People will be able to connect their worlds or realities based on their moral alignments and personal preferences--which will be measured in terms of ''frequency''. Earth would still exist, but it'll be where people go to form different ideas, views and experiences in order to create something new on the other side. Because on the other side--pain, suffering and strife doesn't exist unless the creator of that reality allows it to.
However, there'd be a limit to how much suffering one can endure here on the mortal plane of existence. If the experience proves to be too much for their spirit to handle, they will be presented with several ''exit points'' that they can take. These exit points will present themselves in their dreams, if they choose to return home they will simply pass in their sleep--if not they will wake up and receive external help from ''spirit guides'' masking as humans (or whatever species occupies that planet).