At it's core Valdis Story is a platformer adventurer in the vein of Metroid and Castlevania (Arguably pulling from the middle aged Castlevania's like Aria of Sorrow and Symphony of the Night more than the original classics) and it rewards skilled players with faster levelling and more damage from pulling off combos without getting hit. Luckily even if you're like me and lack the ability to make the game work for you with it's skill cancels and wall acrobatics you can still get down and dirty giving as good as you get.
One of my favorite parts of the game so far has to be the spells and affinity bar. Each directional key as well as jumping has a spell linked to it ranging from the left right directions being line shots to up and down having numerous utlity and damage uses from stealth to healing and even giving your attacks magical properties. The affinity bar is nifty because each slotted spell and equipped item (When they're aligned) slides it either towards Light or Dark giving you benefits related to your stats Neutral is naturally jack of all trades, Dark is for offense giving increase status effect chance and resistance penetration while Light focuses on survivability and utility giving bonus defenses and bonus damage on your Assists.
I will reiterate that the game rewards skill relying on crackerjack timing for some of the puzzles...and sometimes just luck but the frustration melts away when you get to that chest and get a permanent upgrade, a snazzy new piece of armor or even make it to one of your crewmates who somehow got himself locked into a room you needed key items to get into...stupid crewmates.
On the whole Valdis Story : Abyssal City is fun, difficult and frustrating but definitely worth it if you enjoy games in it's genre or even if it's your first dip into the pool.