Having the option to change language is sick! Big fan of that. Continuing on the options, being able to choose between multiple songs is nice too, though they are a bit too short for my liking. Becomes repetitive.
I like the graphics, very colorful, but the low sprite resolution makes the font very hard to read.
The CPU is very impressive! Nicely done. I luckliy had friends ready at hand, so I could play 1v1 as well. It feels nice, but I quickly noticed that after the inital serve, a lot of time is spent hugging the net. There's not much exciting running across the court. Some of the items seem to spawn much higher than the ball can reasonably get.
Nice job! I hope you continue working on this.