hi, same problem here; interestingly, every other key seems to be working, except for movement. And even movement keys work in menu, but not in the game itself. Also, bug found: when I try to change a key to something that is currently assigned to "down", cursor will go to key below and change that key instead ;)
Anyway, I tried above instructions, but to improvement; .ini here:
[CONTROLS]
SAVED_BUTTON1=1
SAVED_BUTTON2=2
SAVED_BUTTON3=3
SAVED_BUTTON4=4
SAVED_BUTTON6=6
SAVED_BUTTON10=10
CONTROL_TYPE=3
[SCORE]
RED_ENDLESS=0
WHITE_ENDLESS=0
BLACK_ENDLESS=0
YELLOW_ENDLESS=0
RED=
REDVAL=0
WHITE=
WHITEVAL=0
BLACK=
BLACKVAL=0
YELLOW=
YELLOWVAL=0
[KEYBOARD]
UP=87
DOWN=83
LEFT=65
RIGHT=68
KEY1=99
KEY2=98
KEY3=97
KEY4=69
CHAR1=49
CHAR2=50
CHAR3=51
CHAR4=52
PAUSE=27
HEALTH=81
[]
TMR=230