Thank you for your feedback!
You would have no way to know, but your "special", "2-player mode" and "different character" suggestions are already in the plan for PongMeister. This - The Squash Alpha - is the first stage of development, where people will be able to get a feel for the game to see if the idea was good.
It will take a little longer, however - details will be coming in a due devlog, as soon as the situation here calms down a little.
Once again, thank you very much! Feel free to continue playing and submitting your scores ;)