Once the game is running, focus on these early-game objectives to progress the story:

Ensure all parts are in the same folder. Right-click part1.rar and select "Extract Here" using 7-Zip or WinRAR . It will automatically pull data from the other parts.

Prioritize crafting a Standard O2 Tank and then the High Capacity O2 Tank to explore deeper biomes like the Twisty Bridges.