Pretty good basic gameplay mechanics. But the metroidvania aspect of it seemed pretty lacking. It was the first time playing a game like this that i felt that every upgrade was a different way to break down a wall, of course every metroidvania is like this but because of the freedom of movement you get at the beggining of the game there isn't much else to give you. There were some cool abilities like the shield and invisibility one, but they were extremelly underused compared to the "this ability helps you break down this wall" kinda skill. Also, even with the roar ability you could easily get lost in the, mostly repetitive, corridors of it's map.

Good game, great feel and basis but can be greatly improved on a sequel.