Silo is a game about harvesting and killing monsters, you kill the monsters by harvesting... what the? (It makes no sense but it's fun once you get good at it)
The controls for this game are simple and listed below:
If you imagine that each cluster of colors is a field, "e" harvests the whole field and gains you points. If a monster is in that field (on the right) when you harvest it, that monster will die.
Don't let the monsters touch you!