Over all, you did good. Entertaining and funny, along with a healthy dose of not doing what's been done absolutely to death...
I do have a couple little suggestions. One tip is to take a little extra care about matching letters to backgrounds for visibility. I'd love to hope for some V.O., but that's as much a question of style as it is a limit of funds in the arts world. I get it. If you're going to communicate most of the "dialogue" by writing, you need to be sure it's as clear and visible as anything else (in fact, probably more so)... So for darker colors in the back ground, you'll want brighter lighter colors for text and vice-versa. I might request just a couple more seconds to read while we're on it, but that's something everyone has to tweak and work on from one project to another. My point is that when you make it quicker and easier to read the text part of the gag, we (the audience) can get a little more time to absorb and enjoy the visual artistic part of the gag. I honestly think somewhere in the neighborhood of maybe two (2) more seconds would be really close to spot-on for at least the longer text blocks...
Anyways, I'm just hoping to realistically help you up the game for the easiest investment. Great stuff, and looking forward to more from you...