Update 1.5.5 brings a lot of new features, and some new content (including a small dwarf planet), and I'm very excited for it as it's the backbone for what will be the final stage of the game - travelling between planets! Spacefaring has always been one of my goals in Aground - I wanted you to be able to eventually build up to travelling between planets, but start the game having no idea that was even possible.
I also set up a Patreon if you want to support my work! It might not seem like much, but every dollar counts! The full changelog for this update is as follows:

• Added Orbit and the ability to travel between planets.
  
• Added a new planet.
• You can now build space stations in orbit.
  
• Added underground structures (and an event that will make them very useful).
  
• Added ladders and walkways for stacking surface structures.
  
• Added several new songs! Here's a preview of Chase composing one of them: https://www.youtube.com/watch?v=x_D2F18Hso4

• Cables and rails can now be placed vertically.
• Structures now operate even when away from the island.
• Blueprint error guides (they visually show you what is blocking the structure from being built).
• Combat update! I tweaked how combat works yet again - it is now easier to defeat enemies without taking any damage (by dodging), but also more dangerous to blindly mash the attack key as they will knock you back out of range.
• 4 more hotkeys have been added by popular demand.
• Miner now gives a quest about minecarts.
• Builder will explain sticky items when you build the storehouse, and sticky items now are placed above others in the inventory.