;-)

This is already mentioned in the description:

On each turn, you can move towards a square orthogonally or diagonally next to you, only if both of these two conditions hold:

• Your direction of movement is at most 90 degrees from the direction of the arrow under you
• Your direction of movement is at most 90 degrees from the direction of the arrow you're moving onto

Which part of this is not clear?

You can google how to install an IME on your computer. Windows makes the process pretty easy, but that's how you can type in different languages' character set if you don't have specific keys for it on your keyboard.

大四喜

Edit: (weird, it displayed good at first...)

But the author is Chinese XD.

Can't you just directly type Chinese characters in the title? 🤔

Examples were added. I don't understand what you mean with horizontal and vertical directions, but row, column is inambiguous if that's the problem.

I can't remember if that space was deliberate or not, but since it appears inconsistently in some translations but not others, and since I did not write anything about jagged grids in the description, most likely it was a mistake.

Anyway, now it is removed. Thanks for reporting it.