What games? Are you playing at right speed?

Just an rpg, actually it seems that the game react to the direction, but its weird

like when i am going up, i change direction and press left (without pause), my char would face left, then pause there, so i have to release left, and press left again to go left

I tried a lot of different speeds already, still doesn't work, this is really annoying, and i have put the game on hold until i can find a fix =/

it would be handy if you tell which game.

Sounds like it might be the keyboard typematic delay, which has an effect in some games. See this thread for a possible solution. Might be something else, but could at least rule out the delay being the issue.

Oh I tried the turbokey.com, doesn't seem to solve it =/
I opened the game without dosbox and the problem wasn't there (but i want to use dosbox because no music if i just open it)

and the game is a Chinese one, doubt you would know 🤣

Wasn't sure from your description if it was just slow to repeat, or something else. Does this sound similar to what you're experiencing?