need help with OOP for simple game

I need to make a simple game in which one controls a ball and needs to push other balls off of a platform. Only pathlib (or os) and numpy can be used to make this work. The platform is made of empty tiles (0) and walls (1) separated by empty columns in a .txt file. The ball that is controlled is represented by the letter X. The other balls are represented by other letters (A, B, C...). The player gives a command to move the ball that consists of direction and momentum. "R4" means 4 moves to the right, "U2" means 2 moves up, "D5" means 5 moves down, "L1" means one move to the left. The ball can move horizontally and vertically, not diagonally. If a ball touches another, the ball stops and the other ball moves forward with the same momentum as the ball had left at the moment of the collision. If a ball collides with a wall, it loses 1 momentum and travels back in the opposite direction. Every momentum added by command equals -100 points and every ball dropped off the platform equals +1000 points. If the X ball falls off the platform, it's game over. If all the balls are gone except the X ball, the game is won and the score is printed. Important events like collisions should also be printed, for example: ‘X collided with A’, ‘A collided with a wall’, ‘A collided with X’, ‘X fell off the map’. Every class and every large related chunk of code (like file input/output functions) should be in their own .py file. For instance, if you have a Ball class and a ’main’ file, you should have a [login to view URL] and a [login to view URL] file. then use the Ball class in the main file by using import Ball. I have added some examplary maps.