With a title like Puzzle I would expect the game to have some actual puzzle elements. Having to press buttons with your mouse doesn't really count.
That aside, the game as a whole just seems like you didn't put a whole lot of effort into it. The controls feel a bit wonky - they're usable, but certainly not great. There's no mute button. And of course, the whole game has only four very short levels.
I feel like you could make a good game with these elements, though. All you need to do is figure out how to use the buttons to make actual puzzles, make the game longer, and adjust the controls a little.