There are more levels in the game than I originally expected. I was stuck at the first level for some time. After completing the first level, I went through all the rest levels relatively smoothly. I really think that you can implement even more levels so that I can play more. Some background information between the first player and second player may be added too.
I agree with Luvik, you can add more audios to make the game more engaging.
Overall, good job!