diff --git a/games/keen/Makefile b/games/keen/Makefile
index 5c039eff..39ab93f2 100644
--- a/games/keen/Makefile
+++ b/games/keen/Makefile
@@ -50,7 +50,7 @@ keen_title.o:	keen_title.s zp.inc hardware.inc \
 KEEN_MARS:	keen_mars.o
 	ld65 -o KEEN_MARS keen_mars.o -C ../../linker_scripts/apple2_2000.inc
 
-keen_mars.o:	keen_mars.s zp.inc hardware.inc \
+keen_mars.o:	keen_mars.s zp.inc hardware.inc game_over.s \
 	sound_effects.s speaker_tone.s print_help.s \
 	maps/mars_map.gr.zx02 graphics/parts.gr.zx02
 	ca65 -o keen_mars.o keen_mars.s -l keen_mars.lst
diff --git a/games/keen/TODO b/games/keen/TODO
index 8814916f..e77231db 100644
--- a/games/keen/TODO
+++ b/games/keen/TODO
@@ -6,7 +6,7 @@ lo-res version
 + check raygun count before shooting
 + fix background tile when get item
 + fix keybindings/help menu
-+ play jingle entering/leaving level
++ better start/stop level music
 + implement leaving level
 + animate death
 + game over screen if out of lives
@@ -14,3 +14,13 @@ lo-res version
 hi-res version
 ~~~~~~~~~~~~~~
 +
+
+mars
+~~~~
++ convert to full tilemap
++ mark completed levels
+
+title
+~~~~~
++ actual menu?
+
diff --git a/games/keen/game_over.s b/games/keen/game_over.s
new file mode 100644
index 00000000..344333b3
--- /dev/null
+++ b/games/keen/game_over.s
@@ -0,0 +1,47 @@
+; GAME OVER MAN
+
+game_over:
+	bit	KEYRESET		; clear keyboard
+	bit	SET_TEXT
+
+	lda     #' '|$80
+        sta     clear_all_color+1
+	jsr	clear_all
+
+	lda	#6
+	sta	drawbox_x1
+	lda	#33
+	sta	drawbox_x2
+	lda	#8
+	sta	drawbox_y1
+	lda	#13
+	sta	drawbox_y2
+	jsr	drawbox
+
+	jsr	normal_text
+
+	lda	#<game_over_text
+	sta	OUTL
+	lda	#>game_over_text
+	sta	OUTH
+	jsr	move_and_print_list
+
+	jsr	page_flip
+
+query_game_over:
+	lda     KEYPRESS
+	bpl	query_game_over
+	bit	KEYRESET
+
+really_game_over:
+	lda	#GAME_OVER
+	sta	LEVEL_OVER
+
+	lda	#LOAD_TITLE
+	sta	WHICH_LOAD
+
+	rts
+
+game_over_text:
+.byte 15,10,"GAME OVER",0
+.byte 255
diff --git a/games/keen/keen_mars.s b/games/keen/keen_mars.s
index 2c8dbc1a..c5c17856 100644
--- a/games/keen/keen_mars.s
+++ b/games/keen/keen_mars.s
@@ -1,6 +1,6 @@
 ; Keen MARS main map
 
-; TODO: should make it scrollable, etc
+; TODO: should make it scrollable, etc / tilemap
 
 ; by deater (Vince Weaver) <vince@deater.net>
 
@@ -9,7 +9,7 @@
 	.include "hardware.inc"
 	.include "common_defines.inc"
 
-keen_start:
+mars_start:
 	;===================
 	; init screen
 	jsr	TEXT
@@ -23,6 +23,9 @@ keen_start:
 
 	jsr	clear_all	; avoid grey stripes at load
 
+	lda	KEENS
+	bmi	return_to_title
+
 	;=====================
 	; init vars
 	;=====================
@@ -126,12 +129,16 @@ do_keen_loop:
 
 
 done_with_keen:
+	cmp	#GAME_OVER
+	beq	return_to_title
+
+	; else, start level
+
 	bit	KEYRESET	; clear keypress
 
 	; sound effect
 
 	jsr	entry_music
-;	jsr	exit_music
 
         lda     #LOAD_KEEN1
         sta     WHICH_LOAD
@@ -139,6 +146,18 @@ done_with_keen:
 	rts			; exit back
 
 
+return_to_title:
+
+	jsr	game_over
+
+	lda	#LOAD_TITLE
+	sta	WHICH_LOAD
+
+	rts
+
+
+
+
 	;==========================
 	; includes
 	;==========================
@@ -165,7 +184,8 @@ parts_zx02:
 	.include	"text_drawbox.s"
 	.include	"print_help.s"
 	.include	"quit_yn.s"
-;	.include	"level_end.s"
+	.include	"game_over.s"
+
 
 	.include	"sound_effects.s"
 	.include	"speaker_tone.s"