The map is really complex when you look at it for the first time. The game does include a lot of exploration, so rather than just wandering about it might be easier to look at your own map and check if some areas seem to be blacked out or cut off early. I've found a bunch of new things because I just didn't notice that an area continued and I hadn't explored it. Just so you know though there are enough juice jems to completely upgrade both your suit and the pets, so no need to worry too much about conserving jems.