from tkinter import Canvas, Tk

root = Tk()

canvas_w = 800# ширина холста
canvas_h = 400# высота холста
c = Canvas(width = canvas_w, height = canvas_h, bg = 'deepskyblue')
c.create_rectangle(0, canvas_h // 2, canvas_w, canvas_h, fill = 'green', width = 0)
c.pack()
#создали корзину
catch = c.create_rectangle(canvas_w//2 - 40, canvas_h - 100, canvas_w//2+40, canvas_h - 80, fill = 'orange', width = 2)
#движение корзины

def move_left(event):
    c.move(catch, -20, 0)
def move_right(event):
    c.move(catch, 20, 0)

c.bind('<Left>', move_left)
c.bind('<Right>', move_right)
c.focus_set()

root.mainloop()