Looks great so far.
If you are going to use a vinyl floor, I would suggest rolling it out over the foundation before putting up the walls. It helps hold it in place. Let it sit in the sun and it will be soft and flat in no time. The vinyl will also protect the plywood until you get the rest done.
Also, like others have suggested......get the floor out to the location where it going to go. Leveling the foundation was the hardest part. Once that is done...the rest is gravy.
If you are going to use a vinyl floor, I would suggest rolling it out over the foundation before putting up the walls. It helps hold it in place. Let it sit in the sun and it will be soft and flat in no time. The vinyl will also protect the plywood until you get the rest done.
Also, like others have suggested......get the floor out to the location where it going to go. Leveling the foundation was the hardest part. Once that is done...the rest is gravy.