I think this video is a good overview for people who might be feeling a a bit confused like "What is this though, how does it work?"
Basically:
Each box has three comics in it, and a deck is made up of cards typically from three comics. You can mix and match comics from different boxes to build a custom deck.
Each comic has a primary genre and a secondary genre. Each genre does different mechanics, and so the game isn't just suited to comics with fighty or magic characters, because slice of life, romance and mystery have solid and helpful mechanics.
In this game, your HP is "how many cards you have left", meaning that less aggressive strategies aren't always bad, and healing to make the cards you have go further can work well.
In fact, if in a box there were three comics which share a general vibe or feel like they match well visually, but have different primary genres, at most only overlapping a little in terms of one or two having a secondary genre that's another one's primary, that's actually better for making a fun deck out of them.
So for example, an Errant deck would be Action/Fantasy, meaning Errant cards would be aggressive and deal high damage, and probably good at buffing other cards to be more aggressive and high damage, or discarding cards to power up killer attacks. It could be that if you then added something like a Slice-of-Life/Romance deck to the box that would help you to bide your time while building the combo attacks, and get more out of the punchy Errant knights by keeping them healed, and say you then add a Hero/Sci-Fi comic, then you have some tanks whose "weaken" mechanic might synergise for very high damage finisher combos.
Basically, it's a pretty elegantly designed game, and there's plenty of space to add comics with genre combos like "Mystery/Slice of Life" or something (there literally isn't a mystery deck at all yet!). It's also potentially a good way to pool promotion resources with other comic creators, and there are options to do things like release alt art, or have the packs bundled with print books and stuff. I'd definitely encourage people to have a look, because there's a lot of potential here.