Nicely done! And indeed, easy.
The point 12 is wrong actually though. The bonus items gives and additional multiplier of x10 so a king on a bonus item square on 50th jump would have multiplier of x500. It is shown as 13 x 50 x 10 so I guess it might be easy to confuse it like you did.
And there is a way to significantly increase the score with your method too but obviously I don't want to explain how to completely demolish and "game" my game. 😊Even though it would score more, it also makes it more complex.
Thanks for playing! ❤️