a neat powerpoint presentation for what it is, there is only 1 choice and it doesn't really matter.
There is also no real escalation they basically jump straight into the action, I feel like they could had just cut on the text walls and it would had been a pretty good doujinshi but as a VN is pretty lacking, specially for an almost 2GB size.
I imagine soon someone will upload the screenshots to e-hentai where the japanese version already is, wouldn't lose anything from not being in an interactive format.