The work tries a curiously traditional IF take on poetry (rather than e.g. a hypertext one like Arid and Pale): There is a PC, who moves around in a two-room world, there are three objects and an NPC, and the basic standard commands are implemented (X, GET, ASK ABOUT, PUT IN). The poem is written from a 1st person perspective, though.
In spite of that mostly traditional IF setting, there is nearly no interactivity: You (i.e. the ”I” of the poem) can examine the few things in the world, but apart from that there is only a single course of action open at any point in the poem. Twice the PC asks himself a yes or no question, but even then the choice doesn’t change the course of events or the point of the poem.
Interactive Fiction can certainly be very poetic. Indeed, Mishima himself has written such works. But I don’t think this particular poem presents an experience or an idea, a truth or a mood, a pun or whim, an image or an approach to language &c. &c. in any poetically compelling way.