it's more fitting to have the player constantly looking at a crosshair, however this to me sounds out of reach of Blockland but I wouldn't be surprised if that was possible.
I thought about mounting an invisible hat on a player that would emit a particle from a point a distance away, and the particle would have the graphic of a crosshair. I don't know much about modeling though or how to set up datablocks, so I'm not sure how possible this is.
I'm not sure how I feel about jumping in a top-down perspective, seems kind-of strange. But hey: if it's used in the correct way then this will be great. We need more variety like this.
I tried to replicate StarTropics II: Zoda's Revenge:
(random image search)
It's a top down game that makes use of elevations. It was made very late in the nintendo's life. (in the 90's!)
Very obscure game, but I loved it and played it as a kid, even though the NES was a bit before my time.