It doesn't look very good, does it? I don't really think I want a man, especially not a man with a gun since I don't have any plans for this to be a shooting game. But it would be nice to have another sprite than in Bouncy. One idea would be to use a spring. It could expand and contract when it jumps.
What about something like a "Beholder". A fleshy ball with multiple eye ball stalks. Very alien looking.