Spoiler alert: definitely worth a look! This game has two main components to it, here are my thoughts:
The combat is fun and engaging: it rewards you for staying in focus and trying to get reads on your opponents, but without becoming super sweaty or technical. The way in which stacking attacks works took a bit to grasp but they way it's implemented allows for some very satisfying combos! While enemy variety is limited for this demo, each enemy engagement felt distinct and required you switch gears in a way that would definitely keep you on your toes if more enemy types/density get added.
Now, the parkour: I have... something of an aversion to jumping puzzles so when I saw this part of the game made the bulk of your objectives I was caught with a bit of apprehension. "Puzzles" is the right word here; the game slowly introduces you to a host of movement abilities and you're expected to string them together into a movement "combo" that solves each part of the puzzle.
To my relief, while some of the puzzles are unforgiving and give you only a short window to figure out what to do next (especially before the patch), they weren't terribly punishing. Aside from occasionally spoon-feeding me adrenaline, completing them felt rewarding and navigating through them just plain looks COOL. While I did find myself fighting with the inputs at times a bit of patience got me through.
TLDR: The game has its sights set on high and definitely has a lot of care put into it. Fun engagements, cute voice acting and animations and a lot of cool little secrets to find. Do give it a chance!