Not bad for a first animation. Keep it up! While I like the facial expression you made @ 0:30, the customs you used kinda looks like you broke your legs. In some parts, the characters were standing above the ground. Other than some minor issues, you did really well for your first animation. I'd love to see how you improve from here on out. Good luck!
Heyo. First off, congrats on your first animation being longer than a minute. It took me about half a year to make something longer than a minute and isn't just a still frame. Anyways, I think Kvn11 covered what I wanted to say, but something else I want to add is, try to have more control over gravity and also the alignment. You can make an alignment line by adding a guide layer in Flash and using the line tool in said guide layer. That way, there won't be cases where you're accidentally just barely touching the ground, and overall a cleaner animation to look at. As for what I mentioned about gravity, while animations exist that just break any sense of logic, it's probably a good idea to avoid spending too much time in the air, to the point that it looks like it doesn't show any sign of weight to the characters. Anyways, again, congrats for starting somewhere in animation, and I hope to see more of your work!
