Save a few bytes in the demo game by using a for loop.

eg/c64/demo-game/demo-game.60p

@@ -90,7 +90,7 @@ word delta
 vector logic_routine table[256] actor_logic
 vector logic_routine dispatch_logic
 
-byte table[32] press_fire_msg: "PRESS`FIRE`TO`PLAY"
+byte table[18] press_fire_msg: "PRESS`FIRE`TO`PLAY"
 
 //
 // Points to the routine that implements the current game state.
@@ -384,23 +384,14 @@ define enemy_logic logic_routine
 define game_state_title_screen game_state_routine
 {
     ld y, 0
-    repeat {
-
-        // First we "clip" the index to 0-31 to ensure we don't
-        // read outside the bounds of the table:
-        ld a, y
-        and a, 31
-        ld y, a
-
+    for y up to 17 {
         ld a, press_fire_msg + y
 
         st on, c
         sub a, 64   // yuck.  oh well
 
         st a, screen1 + y
-        inc y
-        cmp y, 18
-    } until z
+    }
 
     st off, c
     call check_button