Go to the shop if you want to pick up one of these upgrades:
Water Limit - You have quite a small water meter at first, and you'll definitely want to upgrade this as a priority. The more water you hold, the more land you can generate, and this will definitely help you on the way to a three star rating.
Lightning - Lightning's great for zapping clusters of enemies or volcanoes, but if you really want to let the lightning rip you'll want to upgrade its power here.
Lightning Gauge - Just like the Water Limit, upgrading this will give you a much bigger zapping meter! Useful for levels that contain plenty of volcanoes.
Top-Up Lightning - Getting tired of waiting for your lightning meter to recharge? Get an instant refill by spending your coins here.

Embark on an inspiring mission of human connection beyond the UCA. Sam — with companions by his side — sets out on a new journey to save humanity from extinction. Join them as they traverse a world beset by otherworldly enemies, obstacles and a haunting question: should we have connected?