Good concept. It would be a lot better if the maze was randomly generated and if the computer was actually an AI which could make mistakes, rather than just following the correct line every time.
I have the same problem as Donald4. I completed this game a few days ago and came back for the challenge, but now I can't get past level 1; even though it's completed.
It's not the prettiest of games, and I don't like that it takes two clicks to start a new game, rather than having space or enter or something. It does have good game play, though... I find it a little bit addictive.
I didn't like how you have to click on the button text, and not the button frame. I thought the behaviour of the mute button was unforgivable: I don't want to have to turn the music off at the start of every level. Otherwise, okay.
There's nothing wrong with the timer. The game is great... it would be nice if it were possible to get rid of those additional towers that pop up, though... they're irritating. Friendly fire?
I'm not sure if this is a bug or not, but on the first few levels, if you draw a shield and then don't release the mouse button, it won't disappear until you pick up a powerup. Makes the game very easy.
 "Music Catch"){kind=icon}
 "The Next Floor"){kind=icon}
 "Maze X"){kind=icon}
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 "Red"){kind=icon}
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 "Storm the House 2"){kind=icon}