diff --git a/src/demo/formula.1.racer.a b/src/demo/formula.1.racer.a
index a2eded4..cf0d1ad 100644
--- a/src/demo/formula.1.racer.a
+++ b/src/demo/formula.1.racer.a
@@ -14,14 +14,14 @@
          sta   $818
          jsr   $800
 
-         ldx   #$10
+         ldx   #$10       ; keypress
          stx   $6DEC
          inx
          stx   $6DED
          lda   #$4C
          sta   $6DEE
          sta   $72AE
-         ldx   #0
+         ldx   #0         ; set exits
          stx   $6DEF
          stx   $6EBE
          stx   $72AF
@@ -29,14 +29,11 @@
          stx   $6DF0
          stx   $6EBF
          stx   $72B0
-         stx   $71D4      ; reset vector patch
-         lda   #$2C
+         lda   #$2C       ; reset vector patch
          sta   $71D0
-         sta   $71D5
-         sta   $715A
-         lda   #$70
-         sta   $71D4
-         lda   #$D0
+         stx   $71D5
+         sta   $71DA
+         lda   #$D0       ; kill sound
          sta   $7307
          sta   $733F
          sta   $7356