That is all you are showing is sprites. I have a feeling that the problem is in your emulator. Do you by chance know the release date of it? It looks pretty old. You could also try Jnes. NES emulators work fine on slow systems. If you have a Windows 98 computer you should be fine.
Falados
A framewire option is for 3D games as all it is is the lines of the edges of the polygons with no middle textures.