I love the concept of beeing able to build and upgrade your battle robot, that’s super fun. Sadly the combat system as it is, is very unsatisfying, i would have liked to see that the choices you make have some more interesting consequences, than just stat bumps.
I also don’t think the collecting items screen is necessary, it seems very out of place for this type of game. I would have focussed more on the combination of part and how this affects the battle, because that sounds like a game i would love to play.