High Roller has a very nice vibe to it. It's a very relaxing game to get into. That being said, there are some things that I thought break the flow a bit. Like how colliding with a hole, even a little bit, would suck up my ball. I feel like this should be more physics based. I also think your design is too hard on the player, especially near the beginning of the game with the timed mechanics. Because of the volatile nature of the control, these mechanics need more leniency. Not bad though, just needs a few tweaks.