keen: properly track laser shots

games/keen/item_level1.s

@@ -2,7 +2,7 @@
 	; check touching things
 	;======================
 	; do head, than foot
-	; FIXME: should we check both head/feet?
+	; FIXME: should we check both left/right head/feet
 check_items:
 
 	; check if going out door
@@ -30,9 +30,6 @@ check_items:
 check_item:
 	lda	tilemap,X
 
-do_check_enemy:
-	
-
 do_check_item:
 	cmp	#27
 	bcc	done_check_item		; not an item

games/keen/keyboard.s

@@ -276,6 +276,13 @@ check_comma:
 	bne	check_return
 
 comma_pressed:
+	; check if we have any shots left
+
+	lda	RAYGUNS
+	beq	done_comma
+
+	; use up a shot
+	dec	RAYGUNS
 
 	; shoot
 	lda	LASER_OUT