Bouncing ball game tkinter canvas

The problem is that the speed of the platform is dependent on the auto-repeat speed of your keyboard.

Instead of moving once for each <Right> or <Left> event, use a key press to start the platform moving in the desired direction and a key release to stop the platform moving. Then, use after to repeatedly move the platform in the given direction.

Example:

after_id = Nonedef platform_move(direction):    """    direction should be -1 to move left, +1 to move right,    or 0 to stop moving    """    global after_id    speed = 10    if direction == 0:        canvas.after_cancel(after_id)        after_id = None    else:        canvas.move(platform, direction*speed, 0)        after_id = canvas.after(5, platform_move, direction)canvas.bind_all("<KeyPress-Right>", lambda event: platform_move(1))canvas.bind_all("<KeyRelease-Right>", lambda event: platform_move(0))canvas.bind_all("<KeyPress-Left>", lambda event: platform_move(-1))canvas.bind_all("<KeyRelease-Left>", lambda event: platform_move(0))

The above code doesn't handle the case where you might press both keys at the same time, but that can be handled with a little additional logic. The point is to show how you can use the keys to start and stop an animation.