diff --git a/game.asm b/game.asm
index 42cd75c..90dfa5a 100644
--- a/game.asm
+++ b/game.asm
@@ -742,19 +742,20 @@ NotNegativeShieldEnergy
 ;out: Wind (word)
 ;uses: _
 ;--------------------------------------------------
+    mva #$00 Wind+1
+    sta Wind+2
+    sta Wind+3
     lda random
     cmp MaxWind
     bcs GetRandomWind ; if more than MaxWind then randomize again
     sta Wind
-    mva #$00 Wind+1
-    sta Wind+2
-    sta Wind+3
+    beq noWind
     ; multiply Wind by 16
     ; two bytes of Wind are treated as a decimal part of vx variable
     :4 aslw Wind
     ; decide the direction
     lda random
-    bmi @+
+    bmi noWindDirectionChange
       sec  ; Wind = -Wind
       .rept 2
         lda #$00
@@ -764,7 +765,9 @@ NotNegativeShieldEnergy
         lda #$ff
         sta Wind+2
         sta Wind+3
-@   rts
+noWind
+noWindDirectionChange
+    rts
 .endp
 ;--------------------------------------------------
 .proc MaxForceCalculate
diff --git a/scorch.asm b/scorch.asm
index 4cc7af1..5ddce43 100644
--- a/scorch.asm
+++ b/scorch.asm
@@ -41,7 +41,7 @@
 
 ;---------------------------------------------------
 .macro build
-    dta d"1.49" ; number of this build (4 bytes)
+    dta d"1.50" ; number of this build (4 bytes)
 .endm
 
 .macro RMTSong
diff --git a/scorch.bin b/scorch.bin
index 6592e8b..1441a65 100644
Binary files a/scorch.bin and b/scorch.bin differ
diff --git a/scorch.car b/scorch.car
index d3058f9..815f966 100644
Binary files a/scorch.car and b/scorch.car differ
diff --git a/scorch.xex b/scorch.xex
index f1f0e1b..d5afc4f 100644
Binary files a/scorch.xex and b/scorch.xex differ
diff --git a/scorchC64.asm b/scorchC64.asm
index 7fcc5c8..ddf0511 100644
--- a/scorchC64.asm
+++ b/scorchC64.asm
@@ -25,7 +25,7 @@
 
 ;---------------------------------------------------
 .macro build
-    dta d"1.49" ; number of this build (4 bytes)
+    dta d"1.50" ; number of this build (4 bytes)
 .endm
 
 .macro RMTSong
diff --git a/scorchC64.prg b/scorchC64.prg
index c261dfc..777e6d0 100644
Binary files a/scorchC64.prg and b/scorchC64.prg differ
diff --git a/scorch_cart.xex b/scorch_cart.xex
index 7f6ed0d..4fdc79d 100644
Binary files a/scorch_cart.xex and b/scorch_cart.xex differ