Hehe, yes I played Cave Story for about 5 hours or longer that day I would say, so yeh, there might be similarities, tho I have to say I don't see them too much. Cavestory has way more obvious tiling and it might as well be the fact that CS looks like a spunked up NES game of sorts most of the time.
Adarias: Hm, I see what you mean about the highlights, they are not fully white atm, I might revise them tho. About the valves, sprites are precious, you can only have 8 per scanline or you get dropouts, and I only have 1 spritepalette left for other enemies. And be assured that I will do further gfx for this. And yes, I want to have this look so that it could actually run on a proper NES technically.
Hm, he does look a bit like the guy from The Underside, I think I will have to redesign him towards less generic >:0