I was kind of aiming to try something different with this but I kind of lost my drive to work on it after MZX crashed one too many times. It's incomplete and buggy, especially when moving into and out of the water. I think there is a little bit of value in it (I don't recall seeing any other jump engine that allows the player to run over one-block gaps, SMB-style) but I highly recommend against using it in a game.

I might rewrite this from the ground up when I'm feeling motivated.