I vaguely remember hearing that it had one choice, but maybe I’m just remembering wrong. It was far shorter than Planetarian though, I would bet that someone who reads Japanese faster than I can could read through it in like 20-30 minutes, whereas Planetarian is good for a couple hours at least.
The story was very Hinoue-like and it had a higher percentage of fighting than Kud Wafter had of porn, so it felt really bare bones, but it was pretty interesting for what it’s worth.