This is wonderful! In true Fire Emblem fashion, one of my units, Rora, got surrounded and killed everybody attacking him, netting 4 kills and 2 levels, and it wasn't even my turn. The original Fire Emblem is actually quite a bit slower and more abstruse than this.
The music is very accurate to the Famicom's hardware and is stylistically appropriate at all times.
The graphics are cute & highly reminiscent of Fire Emblem (which itself looks not too different than Dragon Quest), and importantly, it is easy to tell what everything is. The knight looks like a knight; the skeleton looks like a skeleton, the archer looks like an archer, etc etc.
I enjoyed my playthrough immensely and I only wish that Henry were here to celebrate with us.
edit: I'm sorry this triple-posted!