No worries. Flutter uses all the boxes. She can jump and climb to anything she wants. Baby gates? She climbs them. Sofas? She jumps up. Beds? She climbs. I've seen her get to places I SWORE she wouldn't get to. Determination is a magical thing

Just keep the front nails a bit longer than usual and your 3-legger will get anywhere they desire.

Again, congrats on your new kitty!