Let's start off with the good.
First of all, I cannot overstate how much I love the visuals. They aren't the most technically impressive anime visuals I've ever seen, but they give off some impressive vibes. If this looked more like a "normal" anime, I definitely would have given it a 6. This show might be worth watching just for those alone. The soundtrack is also pretty good, but it's not special like the visuals are. I liked the characters and the way they interacted as well, even if it got confusing. The fight scenes were a blast as well, and I thoroughly enjoyed all of them. (Also the names of everyone in this show are awesome, they are all super satisfying to say)
Now with the bad. I'm about to say a bunch of stuff I didn't like, but remember overall I really liked this show and I would recommend it.
First, the worldbuilding and explanations sucked. They barely gave any explanations for anything that happened, it all just was kind of happening. If you are going to introduce a world this confusing, the least you could do is explain it! Characters were doing one impossible thing after the next, and they gave like no explanation either. The ending was rushed and ill-explained as well, it felt like they could have benefitted from an extra episode to try and explain how things ended a little better.
Next is character motivations, actions, and relationships. The relationships were all really interesting, but there are tons of flaws. There are wayyyyy too many battles that are solved literally only with the power of friendship (I'm not making that up) and it seems that even characters who don't know anything can still do lots of stuff they shouldn't be able to do. I like how yayaka and Cocona's friendship developed, and I liked how Cocona and papika interacted, but the writers aren't really good at making extremely believable characters.
One thing I had to mention is that there is a single episode that is scarier than anything I've seen in anime so far, and I've seen a lot of anime. I kinda liked the change of pace, even if it did creep me out.
Overall, this is a ton of fun if you can look past a lot of the huge flaws and issues.
