Very nice! It's pretty good. I love the idea of posessing toys to overcome obstacles. It's a bit short, and I would really love to see which other ideas you come up with for interactable toys.
There are a few bugs. I never knew when I was jumping on top of a toy if the game would allow me to attach to the toy or not. In the second level, for example, I often need to jump on top of the mouse twice to attach to it, and I even thought that you weren't able to attach to that frog in that level because it never allowed me to do it! Only after about five retries did it allow me to attach to the toy.
Overall it's a good game and a very interesting idea. Good job!