One of the differences between Wish and other online games is that every player exists in the same world. There are no multiple servers, as it is with current MMOs, nor are there multiple zones. It's one big world, one huge zone, all on the same server.

The second major change is the focus is not on leveling but skilling up. You get skill ups by hitting a monster, rather than experience points at the end of a kill. This allows low-level people to group with high levels without throwing things out of balance.