Very cute concept, I like it. I wish the newly picked up birds would copy the current trajectory of the bird that picked them up, or rather they all shared it. What happens currently is you pick one up, you don't jump for a while because you're already going up, the new bird falls down because they have no upwards force.
Also, just wanted to say kudos to you for speaking out against AI image generation on those other entries. As an artist I really appreciate that you care to say something!