It looks pretty simple at first, but once start connecting you think "oh, that's a cool concept" and then as levels go on you think "oh, author found quite a lot of cool ways to use this mechanics." Idk if at the end you should do something with robot girl, I was just dragging her from wall to wall and tried to jump on that heart, but it was pretty cool ending as well. graphics are a bit minimalist, but that didn't bother me.