To be more specific,

top-down 2d (RPG like interfere), no leveling (exp), little RNG elements and non zelda-like

is that consider an adventure or RPG game?

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From what I can gathered online, RPG and adventure game is two different genre. However, adventure game can have RPG elements just that it is less focused on character development (experience, skills, levels etc). Am I correct to say that?

There most certainly have been Adventure games with RPG elements. Notably the Quest for Glory series, and more recently Quest for Infamy. Including RPG elements is fine, but as stated in the rules it must be clearly and primarily an adventure game.