I thought the concept was really fun! It reminded me of those old Flash pool games. But I felt a bit lost throughout the whole match, not really knowing which direction I should shoot the coin or how to score points. I ended up spending most of the time just shooting the coin back and forth without much of a goal. Because of that, I felt the match went on for too long.
I think making the scoring system and the player's objective clearer would already help a lot in making the gameplay more enjoyable.