Well, in the little time that I did play the game, (I saw someone named Samurai, that's pretty cool) I was able to create a guild, which is cool, the guild icon box could use a few more squares to draw with, since my Spongebob picture wasn't the best, but I like the feature.
Is there a way to target other people, so I can heal them? But of course I'd have to see their health bar first. The Cure icon is identical to the Heal spell, it's easy not to mistake them when using a spell, but for the sake of having two different spells seem different, the Cure should have a different image, changing the color to green would be fine with me.
I shutter to say all this, since this is very early beta, and you probably already know all of this, but you should think about adding a map to the game, along with displaying enemy levels, since the bats in the very first zone could hit me pretty hard from the start and were right next to the slimes. The icon for Wooden Arrows is easily mistaken for a Spear... since it is one, maybe find something else to display it.
You should also have the player spawn in town, preferably near a quest giver, those of which I wasn't able to find. I'll play a bit more later tonight, and try to add a bit more to this list.