While I've really liked the idea of this and many of your other games, the user interface renders them nearly unplayable. Having to move the mouse and click for EVERY SINGLE ACTION really takes away from the experience; adding hotkeys for at least the most common actions would greatly streamline gameplay as well make your games more immersive.
Also, you should consider shortening battle animations and lowering the graphics complexity. My computer is not that old and it still lags even on the lowest graphics settings. This too makes the game less immersive.
That said, this is still a very sold game in concept and I look forward to your future works.
Was the purpose of the annoying high pitched noise in levels 2 and 3 to make the user mute the game, thus missing the rest of the relatively well-done sound? Because that sure is what happened.