Speaking of which, I think we just used some sort of ...gem? slot there. I'm not sure, but if I'm right, I think we have an unknown 3 digit resource of which we only have 1 and some sort of slot which I'm guessing is used whenever we use 'skills' or whatever. Also, the 3 digit might be a counter instead of a resource. So we have a few questions to be answered here:
1. What was filling that slot and how to refill it? The purple gem maybe?
2. What is the 3 digits counting? Some kind of otherworld currency? Number of respawns?
3. Is the bar below the numbers our HP? Our stamina? Spiritual power? Or simply stylistic decoration?
4. Using all of our 'gems' each time we use skills seems inefficient. Can we have more slots?
However, before anything else we need to know if that popup actually showed up or was it actually just some kind of meta knowledge:
[x] Can we see, or at least sense that popup above?