I can't get this to work out right

Recently I’ve been trying to make something in blender. I’ve been trying to put this pixelated image:

into a background. But every time I render, it shows up like this:[INDENT=3]

The image is very blurry, and pretty much unusable. If anyone can offer any help on how to make it show the solid pixels with blending the colors together, I’d be very grateful. I can’t attach the blender file because it’s larger than the upload limit. I can answer any questions about settings and such.

Thank you very much :smiley: