The pixel art looks good. Reminds me a bit of Earthbound, though I myself seldom play jrpgs.
I do have a few gripes with it. Even to my untrained eye (I'm no artist) that floor tile sticks out as not being seamless enough. I can see the pattern from a mile away. Also, it looks a bit ugly the way you've organized those same-looking objects (e.g. lampposts facing each other directly like as if it's a mirror reflection). Even though they're tiles, you're meant to add a bit of chaos here and there, at least misplace them a bit. The trees and lamp posts are maybe not tall enough?
Can't really comment on the gameplay though, not much is seen from the video aside from the traced pathfinding of the ninja guy.
In general, I wouldn't be interested in the finished product, but not because it's a bad concept, just not my kind of a game. Don't let that (or others) discourage you from creative endeavors though.