PongGame | a pong game made with pygame in python | Game Engine library

I m using Window 10 Python -V 3.9 and Kivy -V 2.0.0 and my question is : I just follow the tutorial in the documentation. I want to display a label duce = StringProperty() for a short time like after 1 s it will disappear automatically. I can make it work but want to ask / search for some better solution :) thx

Code:

main.py

As far as I know from the docs: self - references to the current widget instance; root - references to the root widget instance (top layout)

So I have tutorial Pong app. Why do we use self in Rectangle parameters? self refers to current widget instance Rectangle, so when we write size: 10, self.height, doesn't it mean that Rectangle height equals Rectangle height? Or what instance does this self refer to? Thanks.

Code .py:

Does anybody see the problem in this code? Trying to make the ball/bullet come out of the left paddle and disappear once it hits the right paddle but when I try running the code I don't see the ball in general. I think its hidden behind the left paddle but its not moving either when I'm space. I am trying to make a game where the left player would should bullets and the right player would try to dodge them. Now I'm stuck at the bullet. Please help. Thanks!

The left paddle works fine it moves up and down no problem. But the right is okay when I don't move but when I do it moves to the directions I coded to but doesn't erase the previously drawn location which in the end just draws a straight line. Trying to make my first ever game with no tutorial and I'm kind of stuck

Here's the code

So i tried to create an apk with buildozer and kivy that connects to my raspberry pi with Paramiko scp. My code works totally fine until i import paramiko, bs4 and requests although i put these in the requirements section in my buildozer.spec file. I can build the app without any errors but wenn i start the app it immediately closes again and every other module imported does not seem to be a problem. I put my code into the kivy-pong example to see if it works with just importing the modules.

Code:

I am currently working on a space inavders game in kivy. I have a spaceship and it shoots bullets to the enemies. The enemies move to the right and when they hit the border they turn left and it happens again and again. Everything works perfect. I can shoot and enemy is moving. But the problem is I cant create multiple enemies. I have to put a own class for every enemy and write the same code again and again. My idea was that I will create a enemy list and then display them from the list . So that it looks like there are multiple enemies. But I have no ideas how I could do it and I am failing to do it from one day.Also when you another ideas, it would be great if you suggest them. Here is my code.

The enemy class:

I'm reading the kivy documentations. In it, there's an example on how to make your own pong game.

In general, the tutorial is very clear. However, at some point there was something subtle I wasn't sure about.

They make a ball in the .kv file:

a couple seconds into my game, everything speeds up. I cant find any problem with my code but there definitely could be one. I was wondering if its possible that my graphics card is kicking into high gear or something. Any advice would be greatly appreciated, thanks!

I am using the following code to gain an understanding in developing apps. However how do I put a custom text on the ball: