CrossCode was a grand experience, a gem that almost managed to remain unplayed in my dusty backlog forever. I've been playing videogames for 30 years and I've seen plenty of games made with great care and passion. While CrossCode has not become my favorite game ever it just might have taken the crown of "most polished game I've ever played".
The subquests are probably the most diverse element in the game, almost never banal and always trying to be different from each other, offering a new experience whenever possible, albeit they often include puzzles as a common denominator. Yes, puzzles, probably the only requirement to truly enjoy CrossCode is to also enjoy puzzles to a certain degree. The good news is that these are very good and balanced in difficulty as well, you don't really need any external knowledge to solve them and are very intuitive by design.
The combat is top level for a pixel action rpg, there's no grind involved and you can't really get too overpowered since the experience points you get are adjusted to your level... yes, the developers also thought about that.
A special mention goes to the ingeniously crafted maps of the various areas of the game and especially to the chests hidden in them. Finding these was maybe the most fun I had with the game, the devs hid them so well I'm not exaggerating when I say I spent at least 40 of the 115 hours I played trying to find them all. There are even some character lines that pop up when you finally reach a particularly difficult one! These little things put a big smile on my face throughout the game.
By going over every aspect of the game I can't help but think an enormous amount of work went behind everything, you can really see how the devs had all these ideas for the game and fully committed to them without compromises. And speaking about commitment, if CrossCode has a weak point, then that's probably it, but from the player perspective. The game expects the player to enjoy its many activities and not just rush through it, otherwise the pace and the content balance would inevitably be ruined. My humble advice here is to just take your time and do most or even just a part of the side content before continuing with the main story. This way you'll have a splendidly balanced mix of combat, exploration (get those chests!), weird subquests and puzzles.

Good art, gameplay and very good characters. They won't leave.

I always feel so sad when I finish a great game. Loved the characters and the story and everything about this game.

Did have to upgrade NW.js to clear up heavy stutter during the DLC, that would be my only mark against the game.
Download a copy of NW.js from https://nwjs.io/downloads/
Replace the copy of NW.js that CrossCode ships with with that one (overwrite all files and rename nw.exe to CrossCode.exe) -"Admiral Hyouta Curtiss"