the female sprite looks like a male. her chest is flat, her shape is flat, her limps are as thick as a male and she's wearing a guy's hairstyle.
anyway, are you testing this multiplayer on a real server or is this p2p multiplayer. depending on what you're using idk if this could handle even 100 players.
your dash ability looks nice, but i think you should focus on making your game fun before anything else. This would mean improving the battle system and monster AI and abilities. adding atleast 1 or 2 boss monsters with more complex mechanics to defeat.
Oh and throw in a teleport so there are atleast 2 maps to visit.
i think p2p multiplayer is kinda risky for a mmorpg, but i could be wrong.
are you working on this solo?