test_barrels.py

from kivy.app import App
from kivy.uix.widget import Widget
#from kivy.graphics import Color, Ellipse
from kivy.graphics import Rectangle
from kivy.lang import Builder
from kivy.animation import Animation
from kivy.core.image import Image
from kivy.properties import ObjectProperty

Builder.load_string('''
#:kivy 1.4.0

<AreaLevel>:
    canvas.before:
        PushMatrix
        Translate:
            xy: root.pos
    canvas:
        Rectangle:
            texture: root.barrel_image.texture if root.barrel_image else None
            pos: 0, 0
            size: 128, 64

    canvas.after:
        PopMatrix
''')


class AreaLevel(Widget):
    barrel_image = ObjectProperty(None)

    def __init__(self, **kw):
        super(AreaLevel, self).__init__(**kw)
        self.barrel_image = Image('barrel.png') #, mipmap=True)

        for i in range(20):
            for j in range(20):
                with self.canvas:
                    Rectangle(texture=self.barrel_image.texture, pos=(30 * i, 30 * j), size=(128, 64))

    def on_touch_down(self, touch):
        anim = Animation(x=(self.x + 100) % 500 , y=100)
        anim.start(self)


class Building(Widget):
    pass


class GameApp(App):
    def build(self):
        return AreaLevel()

if __name__ == '__main__':
    GameApp().run()

Looking good!