Looks and sounds really nice. And the controls really capture the feel of the original CV on NES and Gameboy!
I will say though, that the stairs are easier to navigate than in the original CV. :)
Many of the enemies move too fast. It's still possible to time your attacks right, but it still feels somewhat unfair.
The decision to respawn the player in exactly the same place after death is a somewhat odd one. It essentially means that death carries no penalty at all. But I suppose it compensates for the speed of the enemies.