This was a pretty neat pixel platformer! I like the oldskool style, though personally I do like the modern style of sprites even better, the smoother style, with less noticeable transitions with tiles, etc. But since you're going for emulating the style of old, it works well! Bit annoying how you jump higher when you speed up, since precision jumping is easier when you're standing still, but otherwise the game mechanics work well. And it's a wholesome adventure, with plenty of variation in sceneries and foes, nice work! Btw, also missing the music!
-cd-