Very cool puzzle platformer! Enjoyed it very much. ^^ Love how it starts simple, teaching you how to do movement first and giving you the block placer later. And the level design is great too, giving you all sorts of uses for your blocks like blocking off guard vision, projectiles or just using them to move around the level. Art style is also amazing! Great main character design and animations. And love the whole light ray aesthetics of the game. ^^
Only thing that annoyed me a little was that restarting after a death felt quite slow to get back into the action. Other than that, loved it! :D