Tips on doing well (even though this game unapologetically cheats):
1) Always assume that the Dealer's hidden card is a face card (20 or 21)
2) If they have a face card, 10, or ace and you do not have any of those then surrender (mitigate your losses).
3) Stand if you are above 16 (Dealer's will stand if they have 17 or higher).
4) Count the cards. If you have a 5, that means there are only 3 of them left to draw
5) Whatever you can see on the dealer, add 10. That is your target to beat. (Example: If they have an 8, then your target to beat is 18).
This game cheats, which sucks considering the art is good but it's locked behind your success. Then it has the audacity to say "you're not very good" for losing. Lucky coins can makes the cheating less egregious, albeit marginally, but it will still screw you over.
I kid you not, the first dealer got 21 (two of which were Blackjack) three times in a row. The second one makes you bust so frequently it defies logic (I kid you not, I hit on a 12 and bust. Next draw, I hit on a 13, bust. Next I hit on another 12, bust).