diff --git a/data/world1/theisland.dat b/data/world1/theisland.dat
index 3e42d76..73ed8df 100644
--- a/data/world1/theisland.dat
+++ b/data/world1/theisland.dat
@@ -25,8 +25,6 @@ monsters
 15 25 17
 15 14 17
 15 13 17
-6 23 17
-6 25 14
 6 12 15
 6 17 13
 1 35 28
diff --git a/edit.c b/edit.c
index 4a0295d..9ddc4c6 100644
--- a/edit.c
+++ b/edit.c
@@ -1047,9 +1047,15 @@ int isplacablesprite(int sid) {
 		case P_BIGSPEED:
 		case P_MOVINGCARD:
 		case P_FIVECARDS:
+		case P_MASKPOWERUP:
+		case P_MASK:
+		case P_TAP:
 			return B_FALSE;
 	}
 
+	if (iseffect(sid)) {
+		return B_FALSE;
+	}
 	if (iscard(sid)) {
 		return B_FALSE;
 	}