diff --git a/board.gd b/board.gd
index 962d2af..183748d 100644
--- a/board.gd
+++ b/board.gd
@@ -42,7 +42,7 @@ func type_at(pos: Vector2i, type: Piece.Type) -> Piece:
 
 # TODO: ball collisions
 func solid_at(pos: Vector2i) -> bool:
-	return any_at(pos, func(p): return p.type == Piece.Type.Wall or p.type == Piece.Type.Ball) 
+	return any_at(pos, func(p): return p.type == Piece.Type.Wall or p.type == Piece.Type.Ball or p.type == Piece.Type.Player) 
 
 func passable_at(pos: Vector2i) -> bool:
 	return not solid_at(pos)
diff --git a/levels.txt b/levels.txt
index be860a6..9072620 100644
--- a/levels.txt
+++ b/levels.txt
@@ -12,6 +12,7 @@
 ; second level is the same layout but the *floor* is different
 ; TODO: multiple levels (could just be stacked on top)
 ; TODO: notation for ball on ice
+; TODO: levels.gd
 
 ; 1
 
@@ -41,3 +42,9 @@
 #   o#
 ###o.#
   ####
+
+; 4 pool
+
+#############
+# @ o  o_ . #
+#############
diff --git a/main.gd b/main.gd
index 12fb0ea..d523100 100644
--- a/main.gd
+++ b/main.gd
@@ -134,7 +134,7 @@ func advance_level():
 	advancing = true
 	if level_num != 0:
 		print("level won")
-		await get_tree().create_timer(2).timeout
+		await get_tree().create_timer(0.5).timeout
 	advancing = false
 	time = 0
 	level_num += 1
diff --git a/piece.gd b/piece.gd
index 2227135..315bfe6 100644
--- a/piece.gd
+++ b/piece.gd
@@ -45,14 +45,21 @@ var speedometer: Label3D
 func do_step(board: Board):
 	if lvel == Vector2i.ZERO:
 		return
-	if board.solid_at(lpos + lvel.clampi(-1, 1)):
-		lpos = lpos
-		lvel -= lvel.clampi(-1, 1)
+	var move := lvel.clampi(-1, 1)
+	var new_pos := lpos + move
+	if board.solid_at(new_pos):
+		var ball := board.type_at(new_pos, Piece.Type.Ball)
+		if ball:
+			ball.do_push(lvel-move).call()
+			lvel = -move
+		else:
+			lpos = lpos
+			lvel -= move
 		return
-	lpos += lvel.clampi(-1, 1)
+	lpos = new_pos
 	var on_ice := !!board.type_at(lpos, Piece.Type.FloorIce)
 	if not on_ice:
-		lvel -= lvel.clampi(-1, 1)
+		lvel -= move
 
 func undo_step() -> Callable:
 	var old_pos := lpos
@@ -110,6 +117,9 @@ func _ready() -> void:
 	speedometer.billboard = BaseMaterial3D.BILLBOARD_ENABLED
 	speedometer.no_depth_test = true
 	speedometer.font_size = 64
+	var font := SystemFont.new()
+	font.font_names = PackedStringArray(["monospace"])
+	speedometer.font = font
 	add_child(speedometer)
 
 #TODO: arrow!