I created it with reference to the video poker of the same name.
If you have all the hands, there is also a double-up.

There are 52 cards in a set, no joker is used, and the cards can be changed only once.
If you have one pair (Jacks or Better) above Jack, points will be pooled and you can proceed to the double-up game. If you do not proceed to double up, you will be credited with points.

Double-up wins if the number is larger than the leftmost card. If the values ​​are the same, there is no draw because it is judged by the strength of the suit.

The strength of the numerical value is as follows.
Weak: 2 <3 <...
The strength of the suit is as follows.
Weak: Club
If you win the double up, the pool will double.
Also, there is no limit to the number of double-ups.
If you lose, the pool is 0.

Card shuffle uses random numbers. Therefore, there is no game adjustment function.
There is no access to the outside other than displaying advertisements. The advertisement will be displayed when the points reach 0. At the time of initial startup, it starts with 100 points.
The highest points are 9,999,999,999.

Good luck!