No, it's just a card game.
While not recognized by any committees it meets the criteria of a sport. While no it is not physical, neither is chess or poker and both of those are sports.
In poker, an ace is considered high.
chess and poker, maybe
Poker
In the game of poker, aces are considered high.
No, a straight in poker does not have to be the same suit to be considered valid.
poker/darts/snooker
A full house is considered superior to a flush in poker.
Yes, an ace is considered a high card in poker, ranking above a king.
In poker, the ace can be considered high or low, depending on the game being played.
In poker, a full house is considered stronger than a flush.
In poker, a 3 of a kind is considered stronger than a straight.