D'aww, Sneaky Girl is so cute! I really enjoyed the art on this one. The music is upbeat, the feeling of sneaky through security systems is a lot of fun, and the binary addition puzzle is a really nice touch.
The controls are a little light. Your movement is tied to the perspective; pressing up won't move you up on the screen, but towards the foreground. That takes a little getting used to, but it makes sense. What makes it tricky is the fact that it takes the character a little while to get up to speed, which makes it quite hard to dodge around the security cameras.
I was stuck for a little while on the last room, as it wasn't immediately clear that I could open the desk when I was stood next to it (or that I could cut the wires on the cameras - my first time, I got through the game without doing so at all). A little icon floating above the desk/wire when you're in range would be helpful.
All in all, though, this is a really solid entry. Keep going! I'd love to see what else you come up with.