fantastic idea and feels original, however it's boring to just wait a long time to see it not succed.
I think the whole part of video games is to remove the boring part, and enhance the fun part.
For example bowling would be boring if you had to go and place the white pieces each time you made a shot.. So speeding up the part or making it possible to shoot multiple shots could remove the boring waiting part.
Collecting the coins is fun and snappy, but extremely simple. No major work done on making it extra satisfying. I couldn't even pass first level. So maybe think more on a softer learning curve.
Game dev is hard and i know it takes a ton of time, it's a really good little game. But could be more finished. - I think if you make it more user friendly and enhance the fun part you could even succed on Play Store or Crazy Games. - People are harsh to judge someting unfinished (only 3.36 stars) And i think it's because they notice all the flaws but once it's polished and publish everyone praises it (despite filled with ads on playstore sometimes)
Another way you can make it more fun maybe, is if you can somehow affect the ball after being shot. or make maybe make it collide with some bouncing things you can control or stuff like that.