Indie game storeFree gamesFun gamesHorror games
Game developmentAssetsComics
SalesBundles
Jobs

Yep, as @nooneimportant12321 mentioned: hold down right-mouse button to pickup base modules. It's mentioned in the tutorial.

Aah, sorry, I just bought the game and just jumped straight in the an endless world and didn't bother to check the tutorial. Sorry for the inconvenience.

No worries.   Cheers!