I like the idea, makes it much more engaging. Some things were a little confusing like the coins concept. Also sometimes the ball trajectory is a little wonky, not sure if that’s just me. Nice work!
Yes, I need to make the coins look like coins, roll around and sound like coins. I'm still not sure of how to convey the multiplier/combo idea. For the trajectory, the engine is homemade and well, let's say the laws of physics have been simplified.