This is a pretty solid game for a week's work, well done. There is a good amount of content here, though the pacing still felt a bit too slow. I like the grid idea for placing your various buildings/generators, it would be nice if there were some strategy to placement (e.g. buffs/debuffs for neighbouring buildings). As is, it just feels like more clicking to manage building upgrades than is really needed. The hot keys are much appreciated though, thank you!
Managing the power and building outputs works really well and the Workers system compliments it nicely. This would definitely be a great base for a bigger game, perhaps with different planets offering unique resources.