This entry does exactly what the title implies. It is a simulator of battles between spaceships, seemingly infinite… well, unless you fail… which will happen (I have yet to win the game…).
Similar to Rogue-likes, ISBS requires some strategy in the actions you perform. Do you get closer to have a more accurate shot or evade to lower the chance of you getting shot? Do you deploy drones or shoot until you die?
You are also forced to choose which upgrade to prioritise when you do manage to shoot down an enemy, though you are limited…
Aside from the gameplay/mechanic, which is impressive in an of itself, the story hints at something maybe more sinister? You are told this is a simulation, and though you feel(?) pain, you supposedly do not sustain actual damage. Is this part of a larger experiment? What is that experiment for? A training for a future space war?
There is definitely more than the author lets on…