Hey, something strange happens in the level 3. When hitting the sand storm, the game goes over.
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Ah yeah that was intentional, it's supposed to represent how the real Oppy (a robot that was sent to Mars by the NASA) died in a really big storm ! But we should've depicted that better with more time I think :' ) But when hitting that storm, you're supposed to see the robot's last words "My battery is low and it's getting dark."