One: Your house should be an option at the world gate
Two: Being able to swim like at the wysteria Villa for example by the running waterfall just be able to jump or dive off and to have a swimsuit shop in the shopping district to buy the most fashionable swimsuits
Three: This ones a work in progress I made with my friend Caitlin Iceblade and underground world where Hades lives and dwells this one peaceful underground land was full of nice tigers, rare brown imps, and stray cats that Hades turned evil to do his dirty work you meet Hades in the begining and he seems nice and thoughtful until the end where the teams up with Morganthe to take over the World Morganthe ends up slipping away before the end leaving Hades alone to be defeated and Morganthe takes away Hades's magic stone leaving him powerless and you still have to defeat Hades who barley has any magic left Morganthe uses the stone to get into the next world.