The art style looks really distinctive, and the background's real well made! I really appreciate that picture of Barbatos in the background there. You can tell this chick's a real robot nerd, probably marathoned Pacific Rim loads of times! The lighting making the room all black and white before it goes back to normal is also a really cool visual.
If I had to name some flaws, I'd say that the sound could be better. The sparkly sound when the girl gets a eureka ends a little too abruptly before she starts doing the scientist laugh. Also, the gesture she does with her left hand when the loop restarts is odd. I think it'd be better if she tried to do that type of gesture with the robotic hand, before it starts sparking up and she has to repeat it again, getting way too ahead of herself. I'm no authority on what artists are allowed to do at all, though, just a suggestion!
I think this loop alone is a really intriguing premise, and I'd love to see it expand into something bigger. I could see that girl carting around her mecha plans all around town, trying to make a name for herself, or the total opposite, like a Dexter's Lab scenario. Either way, I'd love to see more!