Three short lines, and the whole mood is packed into them. The speaker wants out of a room, and they don't much care where they end up. "Anywhere" is the key word: there's no dream destination, no beach or city, just a strong need for any change of scene.
The tone is deadpan. "Would be great" is casual, almost offhand, the way someone might say it with a shrug. That understatement makes the feeling land harder. A person who says "anywhere would be great" is probably more desperate than someone who shouts about escaping.
The poem doesn't tell us why the room is so bad. It could be boredom, loneliness, a stifling situation, or just a long day. The poem's brief, blank space leaves that open, and the room itself starts to feel small and confining, mirroring the shortness of the lines. The mood is restless, tired, and quietly wry.