It's honestly very impressive that you did this all by yourself especially considering your age. I think the reason you didn't get that many ratings yet might be because you don't have a web build, since most ppl don't want to download all the games (happened to my first game jam, didn't have a web build at first and barely anybody rated it) hopefully this works better next time, good luck with that!
Now to my review of the game to give you some feedback:
The game is very nice. It is quite fun. The sound fits the game very well and also the visuals are very nice. I also like the button animations. One nitpick it would be nice if the start screen buttons also had like a hover or press animation.
Only few things that stood out to me which I agree with the other comments:
- It would be nice if time scales with the level
- for the value counting a skip option or a x2 multiplier or sth of some sort would be nice because it can take quite long the further in
- some visuals that stood out to me were sometimes on a few things the contrast was too little (can't read the blue text on purple background that well or when value prizing the dark blue text blends into the background sometimes)
- for the tutorial I'd suggest maybe combining the tutorial with the playing. Instead of having to read everything beforehand, it would be nice if it was learning by doing
You did a very well job. I really liked the game and I wish you good luck on your journey!