There is a way to change the resolution, but there's only a limited range on it. When you run winsetup.exe, you can choose from the dropdown menu to use regular, 2X, 3X or 4X. I've only managed to get up to 3X to work on my computer, but it also lags quite a bit from all the particle effects, so maybe it's just me.
In response to Starmaker, some people do prefer pixel art over the polygonal art of the modern age. I don't think pixel art is necessarily better at conveying emotions than polygons, but there is certainly something to be said for the old style. It also doesn't take as much time and effort as hi-res graphics, allowing indie programmers to ship games easier than a big title.