Exotic Matter is a Minecraft-like sci-fi survival game that transports you to the fictional planet of Xcylin in the year 12039 in order for you to find a substance known as Violex. Once you do find it, you will be able to power your ships engine and allow it to go at light speed. However, the game doesnt try to adhere you strictly to the mission; in fact, it is quite the open world, allowing you to play and explore. You may want to watch your step, though, because fall damage can be taken. When you respawn in the ship in what the game calls a nanochamber, you dont respawn with full health. The only way to get it all back is to exit the mission and go back into it again, it seems.
Source: N4G PC Exotic Matter Preview – ChristCenteredGamer