What's working: Fantastic! It's a fun read so far - Line quality is good, art is bright and cheerful but easy on the eyes, and the premise has loads of potential for comedy or action. The evil Beet Creature is a great design, and I'm interested to see where you'll go with the story. Also enjoyed the Calvin & Hobbes homage.
Suggestions: Not a ton of criticism, but I always try to be helpful and honest... so - your image size is pretty big. Even on a little 13-inch screen, the comic is HUGE. By reducing your comic page to 60%-75% its current size, you will load faster, your readers will get to see more without scrolling, and the images will look even more crisp and professional. Win-win-win.
Keep regular posts & I can see this building a big fan-base quickly!
PS - You've got an extra ".com" in your signature banner, makes it load wrong & go to a junk site.