Nice small game, though definitely difficult with the buggy collision and spikes. I feel the spikes could be replaced with something more nuanced like moving walls that get in your way.
Something cool to continue this game with is changing it so you can plan the layout of the course before letting the ball shoot. So it changes to be more of a puzzle game on how you can make the best hole-in-one. Plus I don't think golf-balls like spikes :P