I'm using all the same parts in Adafruit's Pigrrl 2 build except its a Pi3 instead of a Pi2.
I got The TFT screen to work when I turn on the raspberry pi. It starts in command prompt and it's running Rasbian Jessie. My issue is that I I manually installed emulation station and Retropie but when I run "Emulationstation" the screen goes black and just has a cursor in the corner and never shows anything else.
The screen in question is this one: https://www.adafruit.com/products/2298