What a jump! Probably some of the most progress we've seen yet! I'm trying to put my thumb on it, maybe you're stepping over more so than driving the legs under? Definitely make sure you're keeping the butt down, knees bent, chest up, especially transitioning forwards to backwards or vice versa. It's great to see you pushing yourself outside your comfort zone. Your first steps are great, you're really getting the feet moving and shifting your weight well, just stay low when you switch directions. When you fell, it looks like it was a matter of leaning and having your center of gravity off.