Create large, custom pixel-inspired artwork on the cheap using a simple plywood or medium-density fiberboard (MDF) panel and crafts paint. Arrange crafts paint in the same color palette from light to dark.
Something like this in the front room. (Different colors) Plywood, Painters tape, and different paint colors. I can't wait to see the look on people's faces when I say, "Yeah, it's just a little something I threw together one day while bored.