Below is a guide on where to find the Heart Orbs in Chapter 1 of Eastward.
Underground Tunnel
This Heart Orb can be found in a chest around the northern part of the area at the end of a path guarded by three sets of bush snakes.
Ancient Ruins
This Heart Orb can be found in a chest on the bottom level of the Ancient Ruins past a locked door on the southwest side of the area. You’ll need to move a bookshelf out of the way to reveal a hidden door leading to the chest.
Ancient Ruins – Sam
This Heart Orb can be found in a chest after defeating the boss in the Ancient Ruins. You’ll control Sam and have to search for an exit bringing you to a dark room filled with giant mushrooms and bush snakes. From the entrance, you’ll want to follow the path directly east to reach the chest.
Underground Tunnel 2 (Escaping Jail)
This Heart Orb contained can be found just after the dark-covered room with the mushrooms and enemies when escaping from Jail in a chest next to a broken-down tractor.
Underground Tunnel 2 – Upper Level (Escaping Jail)
This Heart Orb can be found in a chest near the end of the Underground Tunnel in a room.