diff --git a/TODO.md b/TODO.md
index e448b58..8add34a 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,9 +1,10 @@
 ## Levels:
 
-- use first line as background image name
 - ignore comments in lvl files
+
 - check  when sphere bounces from  one end to the  other endlessly w/o
   any solids in between. this is a game lock and equals game over
+
 - Start the game  end timer and add a score FIXME:  put the actual max
   reachable score  into the  level definition  along with  the minimum
   steps required to reach it, also add a step counter
@@ -11,31 +12,35 @@
 - Grid Observer:
   https://github.com/mlange-42/arche/issues/374
 
-
-Screenshot:
-
-Yes, since *ebiten.Image implements the standard image.Image interface
-I just made a screenshot example (in Draw() function):
-if inpututil.IsKeyJustPressed(ebiten.KeyS) {
-    f, err := os.Create("screenshot.png")
-    if err != nil {
-        log.Fatal("can't create file: ", err)
-    }
-    png.Encode(f, screen)
-}
-
-
 - Add some final message when the player reaches the last level, start
   from scratch or a message to buy me some beer, whatever
 
-- Calculate obstacle collision the same as solid collision with future
-  velocity and  included snap in so  that the player ends  up right on
-  the edge of the obstacle and not inside as it is now
-  
 - Check player-player collisions!
 
-- Do all collision detections in ONE system
+- Add  player mergers, possibly as  an option, so maybe  we could have
+  different primary  and secondary  players: one  pair can  merge, the
+  other not. Like S + s and M + m or something.
+
+- Add shaders for animation (player destruction etc)
+
+- Add player HUD + Stats (as hud_system!)
+
+
+## Collider Rework
 
 - do not use the map anymore for collision detection
-
-- check swept AABB instead of my collision detection, to allow for higher speeds
+- central collision_system
+- add Collider component with callback funcs to call on certain events
+- callback types:
+  - rect intersect (== future collision)
+  - collision resolve (set new position)
+  - pass over foreign rect (to e.g. change sprite while flying over sprite)
+  - pass over done (switch sprite)
+- check  for all  moving objects against  non-moving ones  like moving
+  obstacle, player, bullet, laser
+- check if executing callbacks within query loop is allowed
+- callback  function needs to be  able to modify other  components, so
+  possibly use observers for them, e.g.:
+  Collider.IntersectResolve => func(newpos) {player.pos = newpos; player.vel = stop}
+- in the end it must be  possible to add new entities without the need
+  to write a collision check for them, but have collision detection anyway!
diff --git a/assets/sprites/hud.png b/assets/sprites/hud.png
new file mode 100644
index 0000000..0a23d9a
Binary files /dev/null and b/assets/sprites/hud.png differ
diff --git a/game/game.go b/game/game.go
index 22f58a4..d3c697b 100644
--- a/game/game.go
+++ b/game/game.go
@@ -8,7 +8,6 @@ import (
 	"openquell/observers"
 
 	"github.com/hajimehoshi/ebiten/v2"
-	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
 	"github.com/mlange-42/arche/ecs"
 )
 
@@ -119,13 +118,7 @@ func (game *Game) Update() error {
 }
 
 func (game *Game) Draw(screen *ebiten.Image) {
-	//slog.Debug("FPS", "fps", ebiten.ActualFPS())
 	game.GetCurrentScene().Draw(screen)
-	ebitenutil.DebugPrintAt(screen, fmt.Sprintf(
-		"FPS: %02.f  TPS: %02.f",
-		ebiten.ActualFPS(),
-		ebiten.ActualTPS(),
-	), 0, 0)
 }
 
 func (g *Game) Layout(newWidth, newHeight int) (int, int) {
diff --git a/game/level_scene.go b/game/level_scene.go
index d181702..0033e8a 100644
--- a/game/level_scene.go
+++ b/game/level_scene.go
@@ -1,10 +1,12 @@
 package game
 
 import (
+	"fmt"
 	"log/slog"
 	"openquell/assets"
 
 	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
 )
 
 type LevelScene struct {
@@ -69,12 +71,23 @@ func (scene *LevelScene) Update() error {
 }
 
 func (scene *LevelScene) Draw(screen *ebiten.Image) {
+	// FIXME: why not in Update() ?!?!?!
 	if scene.CurrentLevel != scene.Game.Observer.CurrentLevel {
 		slog.Debug("level", "current", scene.CurrentLevel,
 			"next", scene.Game.Observer.CurrentLevel)
 		scene.CurrentLevel = scene.Game.Observer.CurrentLevel
 		scene.Levels[scene.CurrentLevel].SetupGrid(scene.Game)
 	}
+
 	screen.Clear()
 	scene.Levels[scene.CurrentLevel].Draw(screen)
+
+	// FIXME: put into hud_system
+	op := &ebiten.DrawImageOptions{}
+	screen.DrawImage(assets.Assets["hud"], op)
+	ebitenutil.DebugPrintAt(screen, fmt.Sprintf(
+		"FPS: %02.f  TPS: %02.f",
+		ebiten.ActualFPS(),
+		ebiten.ActualTPS(),
+	), 10, 10)
 }