Like my English 1301 professor taught from the beginning, you can't be too hard on yourself on your early work...you just can't. "Just shit out a shitty first draft" is what he always said. Then once we go back and refine it, it won't be as shitty.
On that same breath, though, this could use some work. Not to be too harsh, of course, but hey, you're just starting out.
-Art is a practice, so I'm going to just throw this out there. Draw all the goddamn time. It doesn't matter if you think it looks good or not, literally just fill up sketchbooks with the intention of just drawing. I am SO serious on this, listen to me, do it.
In attempts to make tires look less like amorphous blobs.
Attempting to draw the human figure so you're more comfortable drawing them in more dynamic angles.
Keeping mindful of geometric proportions...or really proportions in general.
Y'know...shit like that. If it exists, have a crack at drawing it. In time, you will notice your own improvements and feel pretty accomplished about it. Then proceed to pat yourself on the back and NEVER stop if you intend to make a career out of this.
It won't end with the drawing; animation is a practice too...and holy shit is it tough work. It's tedious, laborious, and often times overwhelming. Keep in mind how your art can help improve your animation.
Notice the tires didn't seem to roll quite right because they weren't perfectly round. Notice that the scenery with the car rolling along (as it faded to black) tweened away while the car stayed stationary.
Notice that as that guy is standing there that two different frames on the cape don't make a very convincing fabric-against-the-wind effect...also be mindful of spelling; I think you used "affect" when you meant "effect" ...I could be wrong on that one.
Keep in mind on what was intentional design and unintentional mistakes. Little details like the shape of the spotlight where the angle of light would come from, and the angle that you drew it is slightly down...or if you meant that to be the angle to clearly establish that in the shape of the spot-light. Giving the audience members more detail than just blotches of colors and shapes. Having the bottle drip into the mouth and not behind the nose and above the mouth...
...You CANNOT go crazy with the details...everything you look back at and you have a problem with the flash has it's merit, and only you can really do something about it. If you have doubts in how something looks, pull in a few friends or family on their opinions to alleviate or confirm your doubts; I do this all the time, actually.
But what it really comes down to is it's ALL a practice, and the only way you're going to get better at it is if you just keep doing it. As stated before, the musical loop got annoying pretty quickly, and the pace...whoo...the pace was pretty difficult to sit through. It took WAAAAY too long for way too little.
Again, again, again...no biggie. This is your first go at it. I am so, fatally serious when I say you got to, you absolutely must not give up and keep practicing.