You get the rare 1 star recommend review because I can't really treat a pre-alpha first-time coder game like a standard review, but you are trying to learn and I do have some feedback for you:

Having up and down use the WASD set up but NOT the arrow keeps is a really weird choice.

The idle points keep running when you have the game paused while the shop is open. All you have to do is score 10 points to get the first idle points upgrade and then you're off to the races.

I honestly can't make heads or tails out of what the bottom two upgrades are supposed to do, how much they cost, how many times I've bought them, or if they work. I don't think your players are going to be savant who can stack exponent multipliers in their head.

Obviously you're figuring out coding, but a game like this would often have upgrades involving making the paddles bigger, slower/faster/multiple balls in play, etc.