Interesting to see an exploratory golf game. I think the controls are a bit finicky when playing with a mouse which made it less fun to me after a while. I probably would've preferred using arrow keys to rotate and some sort of charge-up swing rather than dragging sliders. It might be more natural on a touch screen, though.
Also good job introducing the mechanics. Making the player turn around to see the key on the first level was a smart way to introduce the controls as well as the key and locked door mechanic!