Finally available and patched, let's see.
It's very cute. The characters aren't quite chibi, but not realistic either. They move a little silly, like puppets waving their limbs around. Each area is a side-scroller, you can only move west or east, but there's a lot of things to tap on and they interact or give you loot, and then swipe up or down to move north or south. There's a minimap and a world map, but not really a middle ground where I can scroll around a big path map.
Opening is very, very cliché. You wake up late for your first day at work as town guard. Mysterious backstory of you and your sister abandoned in the woods. Peasant village has a bunch of wells you can climb down into and there's loot or events. Some running around to teach fighting Goblins (sigh) and gathering sparkly things in the woods. Then obviously monsters attack your beloved peasant village and kidnap your sister, because of course women only exist to be put in refrigerators. You get a literal sword from a stone that makes you a "hero". SIGH.
I got a couple free character pulls (pre-order bonus of Miyu, ★★★★ sword girl who is stats-wise literally the main char gender-swapped, and Bivette, ★★★★ mage with regen and fireball, so that's nice), and spent some "free gems" for a third (Urania, a ★★★ pugilist furry) so I have a full party, but they don't back me up in the story event.
Characters have a lot of skill-ups on an Ability Board, the first board is linear, but the second and later ones give you multiple paths/tech trees. After half an hour I still have no equipment, though, lots of materials but the shop won't make me anything.
Combat's a standard turn-based thing, though so far only attacks and Switch (to change out party), no defense, items, or other actions. I've certainly seen better, but it's functional. There's giant monsters in the woods that are FAR out-level, they just one-shot me, so I guess I get back to those much later. They remind me a bit of the dungeon bosses in Etrian Odyssey, being marked on the map even when you can't see them.
Finally I beat the mini-boss in the main quest and reach the actual title sequence, and get to the time-travelling part.
I didn't level-grind enough in the woods, because now I'm a little under-level for fighting robots in the future, but that'll fix itself soon enough.