I'm losing my dexterity in my old age haha. I kept losing the ball of the edge of the map and also something about the grid being tilted messed up my head like I wasn't sure if the ball was going to follow my true direction when I pressed arrow keys or if it was going to move that direction relative to the grid.
I'm sorry to say I really struggled with this even though the concept is very clear and understandable. I think a lot of people could have a good time with this for sure.