That is why we leave rating by more than one person. Because perceptions differ, from person to person. It is true in almost any aspect of life....Food, religion, politics and yes, even Porn.
Almost everything on here is still in the Alpha stage of development. Quite a few of these types of VN's are not even close to being finished. Sometimes (as was the case with DmD), they will change the procedure of playing the VN, you may have to start over to get all the content, or even change the VN format and story completely.
Writing reviews about your perceptions of the game are always ok.
Just keep in mind, that some people will probably regard anything that sounds too subjective, filled with raw emotion or derogatory remarks, as nothing more than a rant. Keep the review objective, and you will be more likely to be heard by the dev.
My perception of the Visual Novel is that it is fun and light, with some funny, beautiful characters and lighthearted intrigue. I sincerely hope that you continue to play the VN, and stay with it to the end. Maybe your perceptions will change as it progresses. Have fun.