This game is somewhat difficult to play. [Space] while hovering over something to sell it. Keep an eye on resources you're running out of. Turn down Animations if you experience lag. Smoke Mine is a better project based off this. https://scratch.mit.edu/projects/222621679/
This is (mostly) covered in the Tutorial, but if you want extra information: Collectors - the blue Collecting Pylon in the middle of the screen can store Triangles you produce. You can build (by pressing [5]) mini collectors that decay over time and also pick up Triangles that you move onto them. [1] Conveyor - Moves items 1 tile in a direction, click to rotate. Usually you want to direct items into a Collector. [2] Generates Triangles and spits them out. Triangles need to be moved by conveyor into a Collector. This machine decays over time. [3] Generates Triangles at a very fast rate and lasts for much longer. [4] Converts Triangles to Hexagon resources wirelessly. [6] Converts Hexagons to make Tesselator resources wirelessly. Tesselations increase the area you can use. [7] Solar panels generate Tesselations. They don't need anything to run.