Great game feel, sound and visuals make it stand out quite a bit! As others have already pointed out, it's kind of hard to understand what to do at first. But once I got it, I fell immediately for it. Sadly it become s very laggy over time - you probably did forget to free objects that leave the screen? Also I didn't quite understand the point of the pillars (apart from aesthetic reasons at least): the don't serve as cover, as blocks move threw them, but as sparse as they are, they don't pose obstacles for your herd as well. I would consider rewarding points not just for survival time, but also for reaching movement goals (like "move your herd to the green pillar") to prevent the player from camping.