Great start.

Don't let anyone condemn you for taking a long time on something. Spending time on things helps you improve on them. This animation is a great start, there is practically no resizing and the loop is pretty fluid. The only problem is that there isn't enough in-betweens so you're animation looks jerky. I'd recommend adding more frames between each stride.

The ropes are looking good as well, the tension of the pull and then the pull itself is good. Keep up the good work.

-Jake