I concur that this game needs a save system and map. I was alright until shortly after obtaining the arrow and discovering health isn't recovered at death. Until then, things looped around and the absence of enemies etc helped my track where I had already been.
However, I'm stuck where to go. There's a skull gate to the left and the skull is further left, as seen thru the walls but I can't figure out how to get there. I travelled left past a large spike wall but there are dead ends that way. EDIT: found someone else in the comments in the same spot. The skull was disguised/hidden in plain sight.
I must say I was pleasantly surprised it works with my gamepad except for SPACE and BACKSPACE.
Thanks for the info and the game!