This is an awfully demanding question of a bunch of people who have made this game from scratch and with no hope of compensation. I cannot believe that this person requests "more science". Have you not read the research reports? The science behind these entries is truly impressive. I'd bet that at least one of the writers has done some graduate work in science. The science is extensive, and far more detailed than in any other game, and by far more than the XCOM series, in which the "science" was lacking, and only touched upon in the most cursory manner.
To play through the game in one day, and then to ask, "Is that it?" is indicative of a number of problems with this comment. First, it reveals that you have the time to do nothing other than play through the game in a single day. If you have that kind of luxurious lifestyle, then it's unfair to suggest that UFO:AI is a one-day game. That and the simple problem that I don't believe anyone can complete the game in a single day, not if you're actually doing all the ground missions as you're supposed to. Anyway, to ask "Is that it?" seems awfully demanding, and perhaps lacks some - ok, a lot of - respect for what's been done here. You talk about it as if, as a "free game", it's a throw-away, and you're demanding more. Honestly, it's ungrateful comments like this that frighten me with the notion that the creators might throw up their arms and say, "You know what? We've spent months of our lives working on this, and all anybody does is whine that it took one day to complete, and they complain that there's no science when that's clearly not the case."
I don't think you appreciate the profound commitment the creators have made to this project, one that has already produced a game that by far transcends the original. Creators, please don't think this kind of off-the-cuff interrogation represents your fan base. I for one don't even know how to express my gratitude for this game. I never seriously expected that even a commercial venture could produce such a sophisticated game. The detail of the game is tremendous, and I spent 3 hours playing tonight, getting through a whopping 3 ground missions. I named all my agents after my real-life friends and some family. When one agent died, I felt awful - she's a tough babe from my Judo class and I was really sad to lose her, even in battle. Every mission is tense, every end of every round has me on the edge of my seat, wondering what new devilry the aliens will unleash next, what civilians they'll butcher before I can stop them. If I spent all day on the game, I couldn't finish it by any stretch of the imagination. This game is to be played with the utmost care, with every move thought out meticulously.
Maybe the problem is that younger players today have no clue whatsoever how lucky they are to live in the world as it is now. When I was a child, there was Atari, and back then, we thought it was awesome. The game you've produced is light-years beyond anything I had in years past; I'm dumbfounded by how excellent the graphics, sounds, and gameplay are. Some people expect everything to be insanely new, and they want it now. I, for one, consider this game an answer to the prayers of a guy who played XCOM: UFO Defence when it came out. I savored the review in PC Gamer. I slugged my way through to the original Cydonian brain, and lost a lot of good agents along the way. I suffered the insanity of Terror from the Deep, with those tormenting Tentaculats hiding up in nooks and crannies of the alien bases. I played XCOM3: Apocalypse to death. I literally wore out the CD and had to buy another. I played XCOM3 for 10 YEARS, having resigned myself to thinking that it was the end of the line, and XCOM was no more. UFO:AI is as important and exciting to me as when Star Wars: The Phantom Menace came out in theatres after a decades-long hiatus from Star Wars that nearly broke my childish heart when, after Return of the Jedi, Lucas vowed to make no more Star Wars films. But, unlike The Phantom Menace, UFO:AI reinvents its original and takes it WAY beyond. Usher in the era of UFO:AI.
So, Creators, consider my point of view: go corporate. Sell the game. Then make sequels. Just show me the link. I'll pre-order right this second.