Yea I also beat this last month. It has been a game on my radar for a while and I only recently had the time to devote to it.
The visuals are amazing. The whole game is a art piece and takes you through all kinds of ambient color pallets of different zone types.
The music is top notch. Emotionally driven compositions with haunting vocals backed by orchestral instruments makes the environments and characters really come to life.
The story is okay. The most memorable part is right at the beginning where they try and hit you in the feels. The rest of the story kinda takes a back seat to the stunning visuals and great music.
Gameplay is fun. I played on normal, so I didn't run into the problem Tanoomba did with having to grind to max out abilities. Quite the opposite actually. I had every ability just about right near the ending of the game with loads and loads of life/energy/ability cells still scattered all over the land. The platforming aspect of the game was pretty good, with some small hiccups like Tanoomba mentioned above, but overall it all worked pretty good and was challenging and fun trying to figure out how to get past certain areas. They definitely give you an arsenal of tools to get past the different obstacles, and I'm pretty sure, on many occasions, I ended up making life harder on myself than I needed to. But it's still nice to know that you can experiment and get through different obstacles in multiple different ways.
They have an ability tree type RPG element that has 3 branches of abilities that your character inherits as you gain and spend points into each. One branch is utility based (so movement type abilities), Efficiency based (revealing map markers, and gaining extra life/energy), and combat based (making your combat skills more powerful and changing how they function). Along side the ability tree they also have new skills that you gain as you progress through the story, which will give your character access to new areas by using said skills to reach those areas.
If you love platformers, great visuals, and amazing music I'd highly recommend this game.