This reminds me of playing Factorio.. trying to place some sensible conveyor belts... I like it! I think the controls are bit confusing, pressing shift to lock the camera is a bit strange, got there in the end though. My biggest issue was that the arrow icons weren't relative to the current camera facing, which made it quite confusing at times and then often I'd accidentally place the arrow instead of selecting a different arrow. Some of the later levels had some nice aha moments, I like those ones where there were already arrows placed and you had to take them into account. Nice work :)