First of all, if you want to try out this game, I really recommend going for the Ren'Py version, the interface is way less clunky. Since I will post this review in both versions, a small caveat: maybe a few of the following criticisms are not valid for the original, I played the original only up to a certain degree.
After a short introduction which already shows that this will not be a slow burn game, the game itself throws you onto a plane which is attacked by some demons and ends up on a remote island. You are the only male survivor (there is a working explanation for that in game) but a pretty number of pretty females are there with you. From here on out we have a classic sandbox mode - you can walk around the plane and a bit around the island to do quests, get the energy running, make the girl who hates you want to fuck you, pretty normal stuff.
Since for pretty obvious reasons money plays no role in this game, and you only have to get up two stats (for practical purposes even only half of that, more on that later) the grind is very much under control here. Some time-of-day coordination may be the largest issue you'll face. With a well working quest log, also the sandbox part is easily handled with, so while the game isn't short as such you will comparatively quickly breeze through it if compared with other sandbox games. Some may consider this a plus, some a minus.
As for the lewds, apart a scene with your the (soon to be ex-)girlfriend, which also serves as a tutorial, you'll encounter opportunities to shoot your load soon enough, not with all girls at the same pace, the "childhood friend" (no euphemism for "sister" here) of course takes a bit longer, but you won't have to play for 6 hours to see your first female anatomy.
There is a story in this game about the attack and how you can be rescued, which manages to be pretty outlandish and pretty predictable at the same time, but is perfectly serviceable as a backdrop for the proceedings and works to get you going. The general mood is pretty light and humorous, the writing may be a bit on the basic side but certainly isn't cringeworthy either. The pacing may be a bit (not too much though) on the fast side for me, but since I am mostly a slow guy, it may be perfect for many.
As for the graphics: the models you can see on the preview pictures, here you can form your own opinion. IMO not too bad with some interesting characters. The "main" lewds have a good animation loop, some "side" lewds are a bit more clunky, but all in all are fine as well. At the end probably dev time ran out, some of the later characters' scenes are identical except for the model used, but generally speaking there is a bit of variation here.
So in total this would be 4 stars for me, I enjoyed the experience but would not visit the game a second time since there is nothing outstanding for me, gameplay is simple, characters are not very memorable though not unlikeable, that kind of thing. However there are a few issues which irk me, even if not in a "this is bad" way and only in a "why didn't you make it good?" way they will cost one more star.
- The game begins over the top goofy and generally over the top, especially with models and their expressions as well as the character's behavior, but loses that appeal gradually over the course of the game so that in the end you have a pretty standard game. An inconsistency and a small missed chance to stand out.
- The game introduces the idea that you will have to make the girls come at least once, which you will do by amassing 100 points via choosing after reading the dialogue which of the available positions will be enjoyed by her the most. If you succeed, you'll get a better continuation, at two points in the game non-success even means game over. You'll also get some sexpertise points (one of the two stats mentioned earlier) which will help you in future situations. This mechanic promised to be pretty interesting and possibly entertaining but soon falls flat because you get so many sexpertise points so quickly during the story itself that at the second or latest the third encounter you cannot "lose" anymore even with all the wrong decisions. This is not only a wasted chance at probably interesting gameplay but also now the system starts to really interfere a bit with the lewds themselves.
- As a minor issue, two of the girls you had some action with earlier suddenly disappear as dateable while they are still standing around on the plane. While it is pretty normal that you cannot "enjoy" all characters in all games, here it feels off.
So yeah, in the end somewhere between 3 and 4 stars for me but I took the low road because while I was entertained well, the missed opportunities at 5 stars were screaming into my ears. Still, there's a good chance others will well enjoy it.
