My score is 13596, not the first try though.
I like the gameplay, and it might be a good time killer game. Some material interactions were not clear though, I mostly placed whatever blocks I could at random.
The music gets a bit annoying, perhaps longer loop would be nice.
Not directly related to the game but still: thumbnail GIF is not looped properly, and it feels a bit off.
Now to the good part. The graphics and game page look amazing! Like, it's better than my own page, and your game is well-animated. Overall, it feels professional.
The fact that it's your first game makes it an outstanding job.