I don't see why it wouldn't work to have a Pokemon Center in the starting town. Besides, to clear up any continuity errors, you could just have a script at the front desk where if you step on the tile to talk to the nurse, some random guy tells you not to bother the people there unless you have some pokemon to heal. And when you use the givepokemon prompt for when you get a starter, simply setting a flag will prevent that from happening again.
Also, there's a small error on the right side. Two tiles have some grass left, but other that it looks even better. Hope it comes along nicely.
Can you point the errors out to me? Specifics always help and thank you for the encouragement.