Thanks for your heartfelt review , I really appreciate it! I thought a lot about moving in relation to other actions. At the moment moving is a gamble, and it is best done to try to keep the distance between you and your opponent: if you're in good range at the start of the turn, moving is useless most of the time. You're better off moving only when your opponent is way too close or way too far.
But my original plan was to add different weapons with different range. For example, the knife (that I implemented but too late, I will upload a build with it after the end of the jam) has 0 range, which means that the closer you are the better. Always moving forward against the spear makes sense in that case, as it improves both your chances to hit and to not get hit.
Finally, I was also planning on adding different skills, like a way to push back the opponent for example. With all those in place, I feel like moving will make more sense.
I will try to continue working on this a bit, so stay tuned (but don't hold your breath, I haven't been the best at finishing jam games post jam)!