Any good guide around? I feel kinda lost and have so many questions.
The game does a good job of explaining its basics, but it can be a little front heavy for sure, there are some good write ups on the
reddit page. And of course, asking here.
How do you take up quests? I have a notification of new quests, but I couldn't find them.
Talk to girl behind the counter in the arcade, Naomi Detox, shes the quest giver (Well, her laptop is).
How do you unlock decals? I can still only use one and I'm level 21 now.
There are a few ways, just buying them, taking a chance with the Mushroom Stew (which unlocks a random premium decal) and from various rewards. Higher grade fighters will have more decal slots.
And the stats is capped? How do you get a new character with different class?
Yes, stats are capped. Its based on your characters grade, once you reach a certain floor you will unlock new fighters to be able to purchase, the game will let you know when you've hit one of these milestones. Higher grade fighters can then be purchased from your freezer, if you've the space. They start at level 1, but you can level them up fairly quickly again. They have higher base stats so can start with better equipment and can start on higher floors.
Can you buy healing items??
Yes, but not for awhile, and they are pretty pricey. There are some floors that are great to farm them that you can easily stop off on to scoop some up before tackling your current goal. Sending your unused fighters on expeditions can be a great way to stock up too.