There seems to be a lack of flow too. Whats the red thing? Where'd he come from? I'll admit my knowledge of Starwars doesn't extend beyond the films and games, but I think if this was structured a litytle better I could garner some humour, or at the very least some understanding from whats going on.
your font is almost unreadable, and the "itch", same color as the wookie, blends right in. I think you could could cut out the first 3 panels to improve the humor as well as work on the expressions. I'm not really feeling any of them. I did a comic strip myself recently, and I think your biggest downside is you are limited…