These are nice! Clean and well proportioned. In spots the torso is a little long. But I wouldn’t consider it a mistake for a 1 minute drawing.
In my opinion the goal of short drawings is like an archer trying to hit the bullseye. It’s not about eventually getting to the bulls eye, it’s about getting a high percentage of accuracy. You are pretty much on target. It depends on how much stylization you want to imbed into your practice or if you want to be true to the figure. If you gave yourself a little more time, cross counters that respond to perspective would be the next step but some types of cartooning are intentionally flat.
I think you are doing very well. You've developed a simple approach to the figure and it will help a lot when you want to paint one or make one more detailed. One of the things I would start to do is to define light and shade. It will give your work more dimension.