Really nice music. :)
Cool main menu, too!
A key to reset the current level would be nice. And I'd prefer the moved match at its original size and show up at the targeted slot ghosted or something, I think.
Ha! See? I had the feeling there was something like this, but I tried all keys and nothing happened. I also thought the characters shown in the bottom right menu could be pressed to invoke the action. I saw it now, but I kinda ignored/forgot it immediately the last time and never moved the mouse around to look for hidden menus. ;)