diff --git a/doc/notes.txt b/doc/notes.txt
index 502cd8fd..b6cb3c3a 100644
--- a/doc/notes.txt
+++ b/doc/notes.txt
@@ -150,7 +150,6 @@ TODO:
 - upload multiple files/zip file to subdirectory
   - allow "include graphics.asm" instead of "include project/graphics.asm"
 - convert more stuff to Promises
-- target ES6
 - don't have to include firebase always?
   - squelch error msgs? 
   - test offline? (if window.firebase)
@@ -199,6 +198,12 @@ TODO:
   - https://github.com/cc65/cc65/issues/946
   - sample buffer skips
 
+- upgrade to ES2020?
+  - https://github.com/microsoft/TypeScript/issues/16577
+  - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
+  - need Edge 79+
+  - no import in workers
+
 
 WEB WORKER FORMAT
 
diff --git a/presets/c64/climber.c b/presets/c64/climber.c
index b0d453eb..af47edb2 100644
--- a/presets/c64/climber.c
+++ b/presets/c64/climber.c
@@ -410,15 +410,14 @@ typedef enum ActorState {
 typedef struct Actor {
   word yy;
   byte x;
-  byte name;
+  byte level;
+  sbyte yvel;
+  sbyte xvel;
   unsigned int color1:4;
   unsigned int color2:4;
-  byte level;
   unsigned int state:4;
   unsigned int dir:1;
   unsigned int onscreen:1;
-  sbyte yvel;
-  sbyte xvel;
 } Actor;
 
 Actor actors[MAX_ACTORS];
@@ -431,7 +430,6 @@ void create_actors_on_floor(byte level_index) {
     a->state = WALKING;
     a->color1 = level->ladder1 ^ level->ladder2;
     a->color2 = level->ladder2;
-    a->name = 0;
     a->x = level->ladder1 ^ (level->ladder2<<3) ^ (level->gap<<6);
     a->yy = get_floor_yy(level_index);
     a->level = level_index;
@@ -713,7 +711,6 @@ void play_scene() {
   actors[0].state = WALKING;
   actors[0].color1 = 0x1;
   actors[0].color2 = 0xb;
-  actors[0].name = 0;
   actors[0].x = 64;
   actors[0].yy = get_floor_yy(0);
   actors[0].level = 0;
diff --git a/presets/nes/climber.c b/presets/nes/climber.c
index 9e5658b0..1d55dc17 100644
--- a/presets/nes/climber.c
+++ b/presets/nes/climber.c
@@ -388,12 +388,12 @@ typedef struct Actor {
   byte x;		// X position in pixels (8 bit)
   byte floor;		// floor index
   byte state;		// ActorState
+  sbyte yvel;		// Y velocity (when jumping)
+  sbyte xvel;		// X velocity (when jumping)
   int name:2;		// ActorType (2 bits)
   int pal:2;		// palette color (2 bits)
   int dir:1;		// direction (0=right, 1=left)
   int onscreen:1;	// is actor onscreen?
-  sbyte yvel;		// Y velocity (when jumping)
-  sbyte xvel;		// X velocity (when jumping)
 } Actor;
 
 Actor actors[MAX_ACTORS];	// all actors
diff --git a/presets/vcs/examples/bigsprite.a b/presets/vcs/examples/bigsprite.a
index c061cb39..b59fa156 100644
--- a/presets/vcs/examples/bigsprite.a
+++ b/presets/vcs/examples/bigsprite.a
@@ -53,7 +53,8 @@ NextFrame
         sta HMP1	; 1 pixel to the left
         sta WSYNC
         sta HMOVE	; apply HMOVE
-        sta HMCLR
+        SLEEP 24	; sleep 24 cycles
+        sta HMCLR	; clear HMOVE registers
         lda #1
         sta VDELP0	; we need the VDEL registers
         sta VDELP1	; so we can do our 4-store trick
diff --git a/presets/vcs/examples/score6.a b/presets/vcs/examples/score6.a
index 7ee04a18..230d0721 100644
--- a/presets/vcs/examples/score6.a
+++ b/presets/vcs/examples/score6.a
@@ -58,6 +58,7 @@ NextFrame
         sta HMP1
         sta WSYNC
         sta HMOVE
+        SLEEP 24	; wait 24 cycles between write to HMOVE and HMxxx
         sta HMCLR
         lda #1
         sta VDELP0
diff --git a/presets/vcs/examples/tinyfonts.a b/presets/vcs/examples/tinyfonts.a
index f7fd22f9..cb34ab48 100644
--- a/presets/vcs/examples/tinyfonts.a
+++ b/presets/vcs/examples/tinyfonts.a
@@ -49,6 +49,7 @@ NextFrame
         sta HMP1
         sta WSYNC
         sta HMOVE
+        SLEEP 24
         sta HMCLR
         lda #1
         sta VDELP0
diff --git a/src/ide/views.ts b/src/ide/views.ts
index 6225816d..6a94c207 100644
--- a/src/ide/views.ts
+++ b/src/ide/views.ts
@@ -389,6 +389,12 @@ export class SourceEditor implements ProjectView {
   toggleBreakpoint(lineno: number) {    
     if (this.sourcefile != null) {
       var targetPC = this.sourcefile.line2offset[lineno+1];
+      /* TODO: breakpoints
+      var bpid = "pc" + targetPC;
+      platform.setBreakpoint(bpid, () => {
+        return platform.getPC() == targetPC;
+      });
+      */
       runToPC(targetPC);
     }
   }
diff --git a/src/platform/coleco.ts b/src/platform/coleco.ts
index 799fdf79..db60c316 100644
--- a/src/platform/coleco.ts
+++ b/src/platform/coleco.ts
@@ -17,7 +17,7 @@ export var ColecoVision_PRESETS = [
   { id: 'multicolor.c', name: 'Multicolor Mode' },
   { id: 'siegegame.c', name: 'Siege Game' },
   { id: 'shoot.c', name: 'Solarian Game' },
-  { id: 'climber.c', name: 'Platform Game' },
+  { id: 'climber.c', name: 'Climber Game' },
 ];
 
 class ColecoVisionPlatform extends BaseZ80MachinePlatform<ColecoVision> implements Platform {
diff --git a/src/platform/msx.ts b/src/platform/msx.ts
index 7c76d3c4..b06bcf2c 100644
--- a/src/platform/msx.ts
+++ b/src/platform/msx.ts
@@ -33,7 +33,7 @@ var LIBCV_PRESETS = [
   { id: 'multicolor.c', name: 'Multicolor Mode' },
   { id: 'siegegame.c', name: 'Siege Game' },
   { id: 'shoot.c', name: 'Solarian Game' },
-  { id: 'climber.c', name: 'Platform Game' },
+  { id: 'climber.c', name: 'Climber Game' },
 ];
 
 class MSXPlatform extends BaseZ80MachinePlatform<MSX1> implements Platform {