You need 2 goals one on the 25m line facing the same way as the goal in the circle. Use half a pitch.

To try and have the attacking team stretch the pitch and look for different lines / angles to be able to score. Defenders need to be aware of attacking players. Changes the concepts of how to view the pitch attacking and defending different space.

You can make the pitch smaller if needed. You can also bring the sidelines in. Depending on your numbers and how hard you want to make it.