Nexci Scrimish Card Game - Game of Strategy, Memory and Misdirection, Blue/Red

Is this for kid? meaning is it too easy for an adult. looking for a game for 2 players

Is this game only for even number of players? Can it be played by 3 people?

Could 2 people play this on a plane on a tray table sitting side by side?

If I want to play with four to six players, can I purchase multiple card sets of this kind or do i need different styles or types, (or can I buy 3 of