[Solved] need help on controls

[vsub_]

I can think of one reason.
Are you sure some external program is not stealing the focus of the ppsspp window.

If I press Up and make the window inactive,the character will continue to move and when I activate the window again,the character will continue to move(it will stop if I press the opposite key but once I release it,it will continue to move)

There is some work on this problem in the betas but I don't know if it's already fixed.