I really like the aesthetics! The neon lighting effects of drum and drum stick, the particle splashing animation and color selection are all awesome and eye-catching. I also like the beat sound effect when I press the button. My only critique would be adding some more variations or game mechanics to provide replayability, such as making different stages with different kinds of percussion instrument. For example, maybe a cymbal? Anyway, the rest of the game just feels quite enjoyable to me, nice work!