You didn't even read the actual review, did you? There's a difference between a hard game and a half-baked, under-implemented copy of a modpack whose only unique features are boring and uninspired. Green Hell is a hard survival game. Icarus is a hard survival game. This thing is unbalanced and combersome.
You clearly need to play some other games to see what creativity and originality are. When compared to literally any other survival game ever, this game plays exactly like TerraFirmaCraft. Once again, it's neither hard nor a good survival game, (check out Green Hell) it's just buggy. This game has about 2 features that TFC doesn't have and they do NOT justify the difference in price.