Until 31st of October? Isn’t it too cold to go there in the end of October?
I went to Ayia Napa water park several years ago.
I could not say it gave an impression of the greatest waterpark.
We had to wait in long lines to get to the slides, that was quite annoying. To get to one of the games (supposedly the coolest one) we had to wait for 1 hour in a line! And that was nothing really special.