1- Change line 13 and 24 with "While 1" and "WEND" respectively. You shouldn't use goto unless is something that you can't do with other syntax (Like switch case which is not supported by smilebasic)
2-If you want, you can add an extra if to check if any direction is pressed to print a blank space...something like this before the other ifs:
IF B AND &B1111 THEN LOCATE X,Y:?" "
0そうだね プレイ済み