Hell yeah man!!! For an adventure platformer it's pretty linear - there's a world map & all the levels have branching paths, often with different boss battles depending on which route you take (you need to play through levels multiple times to 100% the game because of this since the bosses all drop items/powerups you need to get the true ending). Its Metroidvania-lite approach has some drawbacks (bosses can be really difficult or way too easy depending on which routes you take first) but the atmosphere is unrivaled it's easily one of the best-looking games on the system.
If you want to know the exact criteria for 100%ing the game... -All power-ups -All HP containers -All spells -All potions -All talismans
You need to get all that for the true final boss. I know you'll probably want to scope all that out yourself but I'd at least recommend watching 10:35 of this video bc they basically give you no clue on how to find it: