Developer: Skunk Software
All told, Blackjack 21 isn't as bad as you'd think it'd be. If you enjoy playing Blackjack, this might be one to consider, though its extremely barebones presentation doesn't give it any sort of unique draw beyond the card game itself. The odds are you could easily find a game for free on your smartphone or online that would give you an equivalent or better experience.
Blackjack 21 Wii U eShop by Skunk Software Let's Play