See, THIS is what an NES game looks and feels like. If NES Jam ever needed a demo, this game would certainly qualify. If I could give 6 stars for the feel, I would! This is easily in the top ten for how to do the jam right!
One problem I ran into was the controls were horrendously slow when I was trying to navigate the screen, making it a serious playability issue. The timer was also acting weird with the end going up about 3 or 4 a second. It is probably a problem on my end, but I don't know if this would impact anyone else. If I were to take a guess on why this is happening, it could be related to how the game is being drawn on the screen. I have run into similar issues with JS and trying to apply get and putimage data to convert graphics into an array, mod that array, then plug it back onto the canvas, but it requires a very unique set of circumstances (such as disabling vulnerable accelerators on an ancient web browsers).