That was... decent. It was awesome, in fact! It's well-animated, especially considering this is your first cartoon. It has an amusing storyline as well. I love how the whole thing escalates from a day running a lemonade stand to "competing" with rival stands as they all turn into mecha lemonade battlebots (best I could call them).
The combat scene between the duckbot and the bunnybot (sorry man, what did you call them?) was quite lacking in action, consisting only of angry stares and a single exchange of punches resulting in a nuclear explosion, which in itself deserves a few more frames of proper animation.
Overall, you've made a really funny animation. I've already watched it many times as I was typing this review. Polish your animation skills, and we'll be eager to hail you into the Newgrounds Art & Animation Force! (a spontaneous metaphor referring to all the artists on Newgrounds)