This one's for everyone saying that modern retro-style games are too "hand-holdy".

Full of ideas but extremely bad at execution

A very good Metroidvania that holds up even nearly a decade later. I love the "glitch" themed abilities, and the interactions with some glitched enemies were especially interesting. Combat and exploration are very solid.
My one notable criticism is that direction on where to go next for progression, and where to find secrets, can be especially unclear, with on many occasions the player having to resort to literally trying all their options against every wall, floor and ceiling to find secrets unless they're using a guide. I've played over a hundred Metroidvania games in my life and very few of them have as obscure paths as I experienced here (though your mileage may vary). Though I find this is most prominent during the middle portion of the game, and the game comes together a lot better for me towards the last quarter.