Got stuck a few times, with the ball apparently landing inside one of those platforms after passing the left or right side of the screen. Resetting in the pause menu didn't work, either (no option was selectable and the cursor just cycled through them from top to bottom), so I had to quit and restart the game each time...
Apart from that, it was pretty fun! Captures the NES style pretty well in terms of graphics, sounds and gameplay. Only 2.5 colors (if you count the semi-transparent background), but they're used well.
It's challenging and at times a bit frustrating when you miss the right platform by just a few pixels, but that makes it even more rewarding to get it right shortly after that! Needed 93 shots for all 18 holes, which is probably slightly over par, but for an amateur, that's probably alright. x)
Fun game!