I like your characters, and I like your creature. I would liked to have seen the more detailed version of the creature in the panel immediately following his intro (1:2). That way, we have a better idea of what he looks like, and our minds can fill in the details when you push out further (as in 1:3). If possible, switch 1:3 and 1:4 and give us a good look at this great character right off the bat.
Because you've drawn great characters, I'd like better backgrounds to sit them on. You're drawing a sci-fi world, so let's see it in a bit more detail. As with the creature, give us a couple of detailed panels at the top of the strip, then you can get away with sparser b.g.s later on. Nice start though, mate. I'd work with you in the future if you're up for a collaboration.