Easy, except that Mass and DE are a bit hard to spell, and you don't accept Washington DC or Washington or DC for the District of Columbia so if I didn't know that that was the answer I probably wouldn't have gotten it.
Missed Tennessee because I couldnt get the spelling correct and district of columbia because as already stated isnt a state. Other than that, fun quiz:) Thought you were a bit too nice with the timelimit, you got enough time to write all the 50 states.