This is my first walking test.I know its short, I'm kind of in a rush. Here:

Yeah, the front leg needs to be straightening (but not quite straight) before it hits the ground. I think it could use another frame in the middle of each stride too. Leaning forward a bit would help with the balance. Besides that it's fine. Not bad at all for a beginner.
That football animation was not the full animation, but this is

The physics are off a bit for the spinning kick over the head - it looks like he's pinned to one spot and rotating around it rather than jumping up and being subject to gravity.
When it hits him in the face it should have bounced a bit more to the right, I thought. You didn't need to ease the fall halfway through either.
Besides that it wasn't bad, considering the complexity.