not to derail but if you get particularly into it i'd recommend checking out 2 eventually, with the caveat that generally the difficulty is upped and sometimes it feels more like in an unfair (enemies offscreen, occassional forced gimmicks) way, however it's similar to the first as a possible "zen" for lack of a better term game, where if you don't give up and seriously focus getting a chain or whatever, sometimes it just clicks, and then you hear the end of level ambience and wade through the carnage and it's kino
additionally has multiple characters with different gimmicks and difficulties which adds more replayability