Here are some of mine!

• Blue Cruiser is essentially a whale -- huge and almost blind, it doesn't bother to look for food -- it just swims along, sometimes avoiding walls, sometimes just taking the hits.
• Righty is the first Critter I've seen evolve that can actively seek out food, "seeing" it visually and then turning to approach it. However... it can only manage this feat if the food's on the correct side!
• Meaty Boi has the very beginnings of a scavenger lifestyle -- it has evolved to "prefer meat" and seems to sometimes actively seek out corpses when they're nearby. 
• Zoomba shoots forward till it sees a wall, backs up, turns, and shoots forward again, like a Roomba.

Just download the .critter file and then add a saved critter from the Level Tools menu in-game.  Let's see yours! Post links to your google drive, dropbox, or wherever.

My critters have finally reached a milestone: I present to you, "Super Seeker." This little guy is something of a "holy grail" I've been chasing since day one.

This clever little critter is the first I've seen with the ability to not only  avoid obstacles, but detect and navigate toward food in both directions. It can serve as a solid baseline for kick-starting a new germline of very successful critters -- although if you add it to an existing simulation, don't be surprised if it drives everyone else into extinction!