After some math and making sure CY stays at certain values your menu should look like this:
LOCATE 10,10
PRINT "WORDS"
LOCATE 10,12
PRINT "STUFF"
@MENU
VSYNC 1
IF BUTTON(2) AND 1 THEN CY=CY-1
IF BUTTON(2) AND 2 THEN CY=CY+2
IF CY<0 THEN CY=0
IF CY>1 THEN CY=1
LOCATE 8,10+(CYx2)
R$="@MENU"+STR$(CY)
IF BUTTON(2) AND 16 THEN GOSUB R$
GOTO @MENU
0そうだね プレイ済み