diff --git a/js/game.js b/js/game.js
index cdf5dba..f753a74 100644
--- a/js/game.js
+++ b/js/game.js
@@ -9,7 +9,7 @@ config = {
   max_zoom_factor: 130,
   min_motor_speed: -2,
   max_motor_speed: 2,
-  population_size: 1,
+  population_size: 4,
   walker_health: 100,
   max_floor_tiles: 50,
   round_length: 1000,
diff --git a/js/walker.js b/js/walker.js
index 53e472f..3b61981 100644
--- a/js/walker.js
+++ b/js/walker.js
@@ -64,7 +64,7 @@ Walker.prototype.__constructor = function(world) {
     arm_width: 0.12,
     arm_length: 0.37,
     forearm_width: 0.1,
-    forearm_length: 0.42,
+    forearm_length: 0.30,
     hand_height: 0.08,
     hand_length: 0.18,
   }