i really love this game. it just has a great sense of mystery in a lot of the levels with all the various secrets and hidden treasures and it features some of the best sound design in a platformer. some of those boss levels just feel really consequential - i always liked the last several castle levels especially. it's more conventionally designed in some ways than the Wario Lands that followed but i always felt like it had a better sense of atmosphere that reflected the character of Wario better and less of a loosey goosey sense of arbitrariness some of the later games could have at times.