As others have mentioned, even though there aren't many types of enemies, the gameplay is different depending on the stage, which is fun!
And above all, the sound is really satisfying! It was great!
The giant spider was quite strong and I struggled, but I managed to defeat it by retrying and honing my skills.
In Aggressor Mode, if you're skilled enough to defeat the giant spider, you can rush through to the end without the gameplay feeling changing much.