It’s a great idea and definitely fun at first, but it’s very easy. It could definitely benefit from different speeds or modes. Some ideas I can recommend are making it gradually get faster and faster the higher your level is, and having different modes with more or less colors to make it less or more challenging. Another thing I saw was the balls looking 3D didnt really fit the rest of the simplistic design, so I would either make them just a simple circle or make them a circle with a simple design on them that spins or maybe effects around them. You could even add a reward system where you could unlock different skins the higher score you get. Those are just a couple of ideas I had. It’s a great start and I’m looking forward to any updates that might come!