This is fine pixel work, but art is something that isn't necessarily good if only well executed. In fact, I find it's rather bland this way. I'm really just talking to myself, but whatever.
If you've read any Shakespeare, the fools generally play a large part. As conceit stated, they say the truth, and are usually very intelligent. They're funny, but there's always a large twist of realism in their bland humor. You cloud easily get away with the happy-jester fool card, but everyone's pulled that. Why not try something unique? Try a King Lear esque scene- heavy rain in the grass, or near a castle, with the king looking blind, mad, and hopelessly lost, with the background and the king in relatively unsaturated colors, with a fool advising the king, making the fool a tad more saturated to make it clear whom the card is referring to. Or have him looking ludicrous, but intelligent, like sitting quietly in a library reading/contemplating with a horrendous outfit. Just to be unique. But give him depth, and give him intelligence.
Done ranting. Good luck, and happy pixels!
Toodles!
Shrike