So i preordered a game on amazon and selected two day shipping. It said select two day shipping to get it on release day and since i had prime, I did it. The game releases tomorrow and it just now shipped. Will I get it tomorrow?

Pay no heed to Ryan M. He's a nihilist. You will likely get the game the day after tomorrow, but it really depends on your location. Check the tracking number, it should provide info on where the item is being sent from.

Amazon two day shipping?

If it shipped today, that makes tomorrow Day 1 and Wednesday Day 2. Is two days from today tomorrow?

The two days does not count the day it shipped. That is Day Zero.