The Mobius Machine might just be the most minimalist and magnificent Metroidvania to ever be released. It features a pint sized protagonist, or micronaut if you will, who finds himself in the middle of a perplexing situation where dream meets reality, perpetually.
In his dreams he sees a machine that implodes on a mysterious alien planet. He pursues an exit afterwards only to be gobbled up by an alien creature of gargantuan proportions. Ultimately awaking to a distress signal from the Isolaris moon. Something that intergalactic law demands he attend to lest he face criminal penalty. It is upon making his way there though that he crash lands, loses his robotic companion Robbie, and finds himself in an eerily familiar place. A place he must scour for resources, and tools in order to escape.