Here is our strategy for Angry Birds Space Utopia Mirror Level M4-21. This level is unlocked by obtaining 3 stars on Utopia Level 4-21. The strategy shown yields a score of 127,240.
Please note: Any screenshots for underdog proof other than the initial 3-star tally high score will no longer be accepted. Do not replay this level to obtain the 3-star tally screenshot with your original high score beneath the current score.