I really wanted to like this series. And even though I kind of do, I have some major itches for it (there are also a few great things).

Things I disliked:
1) I hate the "I text with my crush but they don't know it's me and we become emotionally attached" so much. Especially when all the lying goes on for a few episodes (MSP had this also but they gave it up after a short while). The fact that Sun fell for Earth was already like starting a romantic relationship in a very toxic way.
2) Outing each other. Since Ongsa didn't want to tell her parents about her relationship with Sun, we clearly do not have here a world where queerphobia doesn't exist. And if so, why is Luna outing Aylin (and calling her her girlfriend even though they did not talk about their status) and why is Sun outing Ongsa to her parents? Take a hint, Sun. This kind of things should be talked about first.
3) The whole alien treatment. Aylin is clearly autistic-coded and she was constantly (for the first few episodes) forced to do stuff even though she very obviously was not comfortable. For some things, she didn't even get Luna's apologies.

Things I liked:
1) The teachers' storyline. I hope this actress' pairing will be cast in other series cause it was very adorable.
2) How Charoen hasn't fallen for Ton's flirting. Otherwise it would have felt forced.
3) The overall cuteness.
4) How they developed Alpha's character and problems.

There were a lot of moments where the creators could have done the right thing and add a little apologizing here and there, and simplly not include some of this toxicity. But overall, for first proper GMM's GL, it was good and adorable and I sure hope they keep improving.