Outstanding!
I love how this game is designed. I initially opened this game up when I friend was over who didn't like MLP. I stopped playing 'cause it looked a little simple and wouldn't entertain us both. I wish I woulda kept goin'.
I absolutely love the use of color in this game, I wish there were NES games out there that did what this game did. It set the mood very well and was able to instill a scary atmosphere using a limited palette and resolution. Another thing I enjoyed that made it feel like it could essentially be a real NES game is the fact that when you die you start at the beginning of the cutscene. Designing the game like that might be a bit cumbersome to some players, but it also gives you a reason not to die. (I recently beat Ninja Gaiden and Zelda 2 which both did similar things.)
I'd love to see a full expansion of this game, keep up the amazing work.