Note: I don't believe a complex opinion can be properly represented by a number but I do understand some people are impatient so I don't use the star system normally, my ratings are as follows. 1 don't recommend, 3 unsure please read review, 5 recommend.
Goblin layer is a spoof on goblin slayer the anime/manga best known for the first episode which promptly displays horrible rape for, basically no reason, the proceeds to be a tame and normal anime except that now there are just rape victims throughout the show that kinda clash with the tone.
In a lot of respects I'd say Goblin Layer improves on the story and characters a lot, the titular Goblin Layer's character is about as deep as a raindrop hitting hot metal but at least he actually has a personality, unlike the show. It actually makes some sense that the chicks in this would wanna fuck GL since there are no other men and they can see him fuckin. The girls are also there but they don't matter as much because the one thing kept form the source material is the MC only wants to deal with goblins and nothing else, he has 1 drive and nothing else matters or will alter that in any way, Unfortunately this means you pretty much only fuck goblins, and hey credit to the devs the goblins are hot but they get stale after a while.
It's an RPGM game and you are encouraged to play it like a real JRPG for some reason thankfully you can cheat otherwise I wouldn't have even bothered, I would say subpar at best.
To be honest that's kinda it, there isn't much to this game, it's also not complete at time of writing so eh? I didn't complete the game as is because I got sick of the JRPG shit and realized other games don't have that so I played all of those instead. If the art catches your fancy, you don't mind some mediocre humor nor the RPGM crap then give it a whirl, otherwise go play all the other games.