You need to open the More Information box that is located after the description and before the comment section of a page. The tags are in the "genre" and "tags" section.
I skimmed that trailer and categorized it "action adventure", because you operate the game in real time. The opposite would be a turn based system.
The tag explanation on Itch says this:
Action RPG
Combing element of Role Playing like character development, equipment, stats, and open-ended stories with real time action.
Action-Adventure
Blending elements of action and exploration, these games often feature combat, puzzle-solving, and narrative-driven quests. Players navigate immersive worlds, overcome obstacles, and engage in dynamic battles while uncovering the story and developing their characters' abilities.
In your introductory description you liken the game to Legend of Zelda. https://en.wikipedia.org/wiki/The_Legend_of_Zelda
Genre Action-adventure
A key element is, that those game require physical skill of the player. If you can fail puzzles, if you do not move the character at the correct time or activate the right skill at the right time. That sort of thing. If you just walk around and explore things, that's an exploration game or even a walking simulator.
What can also help is to look at popular games on Steam. If you think, your game is similar to a particular game, look at the tag list for that game. It should give you a very good estimate how players call certain things. The tags on Steam are user chosen and you will see the 20 tags in a sorted order. Unfortunately, the Zelda games are not on Steam ;-)