You should have the tutorial cover the main menu as well, because as it is now, I can't even get past that. I'm pressing all kinds of keys. Nothing happens. Arrow keys. Space bar. Return. Letters. Nothing.
I like the graphics, at least.
EDIT:Oh. Reloading the page seems to have done the trick. Let's see...
EDIT 2:Okay. Tried it out. I guess it doesn't quite feel like a game yet, but this is still a very early version, isn't it? Maybe I missed something, too. Anyhow, the concept looks promising. Seems like it could be fun when there is more interaction going on between blocks and characters and everything.
I don't know if this is a bug specific to your game, or a general problem with applets, but I had undocked the applet from the page into a new window, which appeared as a Java process, rather than a window of the browser. When I closed the tab, without thinking of what I was doing, before I had closed the undocked Java process window, the Java process froze, and I had to force quit.