Bad d pad control

The thing is, the control was fine when It first got out on my iPhone 5. Now the d pad position reset if the thumb go too far away from the predefined area. This really make the game very hard to control. (To get a feeling of how the d pad should behaved, test out the game robbery bob).
The other review is wrong about the video aspect ratio. You can change the setting in-game.

Crocodillette about METAL SLUG X, v1.0.1