version 2.2.0 is a major update focusing on general content and improvements

what's new?

added crouching, decreasing your height to get into smaller tunnels (default: left control key)
bows now require arrows
all firearms now require bullets
added iron, steel, slime and glarestone bullets
added iron, steel, slime and glarestone arrows
added ice on lakes
improved mining sounds
added difficulty (peace (no enemies), normal and hard (drop 1/3 of your inventory))
added lil' bomb, an annoying running bomb, dropping gunpowder
added gunpowder, grenades and a grenade launcher
liquids will now react
added obsidian
added the spawn, it allows you to set the world spawn
added builder villager, selling blocks
added muffins

planet systems overhaul, each system has its own "theme"
added 2 lava biomes
added hot lava stone
added lava gem, usable as a tool modifier to apply fire damage (dropped by hot lava stone)
added flarewood tree (including sapling, wood, planks and wooden wall)

fixed enemy spawning too early, some enemies, including Orks, now spawn in higher systems.
defeating the void golem now unlocks the second planet ring, the executioner the third
fixed fullscreen-toggle error
decreased health of ghost
removed ores from map (made no sense)
fixed crashes on unicode pathes (sorry to those affected by this bug!)
fixed typos and smaller bugs
dark spirits (and the dark spirit boss) now drops gunpowder
moved mithril ore to system 2
moved glarestone ore to system 3
crystal golems spawn in system 3
skeleton guards spawn in system 4
increase shield modifier cooldown to 15 (from 5)

main quest expansion to unlock system 4
another sounds overhaul
custom planets - create and enter custom, optional private worlds, if you ever need more space or resources!
signs - displays text or items, never forget which chest contains what again!
and some community requested features