congratulations, you've played yourself, hehe, the only sort of animation there, is when Pop crawls, I made it so it scales down on the y axis to both squat the mesh and shorten the hitbox in order to fit small crevices, other that that, it'd only be your brain filling the gaps
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I also did that in my submission, for my Minimiser, Maximiser and Normaliser power-ups, I just scaled down/up the Player. (If you want to see it for yourself, click here!)