A cross between Reincarnated as a Slime and Arifureta.
It's a decent isekai so far in my opinion. It's similar to Reincarnated as a Slime, only the main character is born as a spider, and we spend most episodes (so far) in the dungeon where the main character is born.
We see her fight new monsters, level up, gain new skills, and slowly learn the mechanics of the world. She is alone, struggles immensely, and talks to herself. So it's similar to Arifurea in that respect, but the tone and comedy is similar to Slime. We get a sense that she'll eventually become OP in the world.
However, she isn't the only one who was transported to the world as (like Arifureta) the rest of her class is also here, but in a different part of the world, and as humans (mostly). I think this is where the story gets decent for me.
The character dynamics is interesting, especially when they reference to life back at school. The character foundation feels pretty solid. There's some conflict. And there's anticipation of when the rest of the class will meet the main character and she'll be overpowered somehow. I think that's what keeping me engaged so far.
The animation and art is good. There is some CGI, which some might hate, but I don't mind it as it isn't too strong in my eyes.