Speed up button on android ppsspp app

[ZLO_RD]

i run ppsspp on android with 480x854 (240 dpi) resolution, i like emulator pretty much

But there is a joystick button in bottom left that is there and i like to use it and when i tap on it it kinda get little bigger, i also like that, but apparently you can tap 2 buttons with one finger,

and also when i just try to turn right with joystick on touchscreen it touches speed up button and i push them both (and character spins like a wild )
maybe it is just my resolution but that joystick + speedup/select/start/square/triangle/circle/"x" buttons only can be pushed both with single finger, and i tab exactly speed up button on accident all the time, that is small issue for me...

i didn't read FAQ, or anything at all about ppsspp before, but i just hope developers were avare of that or be aware of that, just hope it helped