When the Brother character is introduced, it is mentioned that the protagonist apparently owes money to someone, and the Brother repeatedly cycles through an animation involving him producing a gun, which he aims at the protagonist. At the end of the encounter, the sound of a gunshot is heard, as well as a Wilhelm scream, and the screen briefly flashes static. Towards the end of the game, he says "You know how I shot you in the head. I take it back. Please come back."
The two aliens recur throughout the game. They mention that they "hope the coins are familiar to" the protagonist and tell him that in space, "weird things may happen to you" and that "it looks like you've gotten yourself into a strange pickle that you can't get out of, which may lead to some strange experiences." They also indicate that the coins "will help to clip along your journey," perhaps indicating that the protagonist is dying. Further, at one point the aliens recite a lullaby ("Lullaby and good night…") to the protagonist, and at the end of this lullaby, they say "Your spirit has left your body, and you are safe". Later in the game they also seem to mention a serum being prepared; in this paradigm it might be an attempt at some life-saving exercise.
The end of the game features the protagonist in a trippy, psychedelic area with reggae music playing and several NPCs he had encountered throughout the game; the game in general is all-around weird.
Sluggish Morss: A Delicate Time in History may offer further support for this idea. In the second game, some passengers on the spaceship note that a disturbance in G Quarters has erupted, and the inhabitants are derisively dismissed as inferiors. The captain of Sluggish Morss is appalled to learn that an outbreak of violence, which had not occurred for over nine thousand years, has occurred.
Based on this, it is entirely possible that Sluggish Morss is the Dying Dream of the protagonist, murdered over a case of owing money.
