ok, I have a dumb card game idea

it's like a mix of blackjack and somewhat 21 cards. you have 6 cards and the dealer give you a card faceing down which you put it in your sleeve, anytime you got a card you don't like. you replace it with your sleeve card and put it face down on the table. this where the 21 thing comes but it's not about geting to 21, it's about geting to the highest number possible. if everyone did this, that means 5 cards are faceing down on the table, if not, the dealer need to put down a card until it hits 5. when he un-face the cards, hope you have highest number to win. I called this "hand of fate"

is this good or no?