"Arkanoidvania"? Come on now. Can't your game stand on its own without buzzword soup? Is it a "Soulslike rOgUeLiKe MetroidArkanoidBlasterMastervania"? How about calling it an ADVENTURE GAME?
You're probably right! I generally don't like buzzword either, but I like 'arkanoidvania, I think it describes the game accurately. After all, my game IS a mix between arkanoid and castlevania :)