diff --git a/columbus/env.py b/columbus/env.py
index 855ac16..40807f8 100644
--- a/columbus/env.py
+++ b/columbus/env.py
@@ -456,21 +456,24 @@ class ColumbusComp(ColumbusEnv):
 
 
 class ColumbusSingle(ColumbusEnv):
-    def __init__(self, observable=observables.CompositionalObservable([observables.RayObservable(num_rays=6, chans=[entities.Enemy]), observables.StateObservable(coordsAgent=False, speedAgent=False, coordsRelativeToAgent=True, coordsRewards=True, rewardsWhitelist=None, coordsEnemys=False, enemysWhitelist=None, enemysNoBarriers=True, rewardsTimeouts=False, include_rand=True)]), hide_map=False, fps=30, env_seed=None, aux_reward_max=10, **kw):
+    def __init__(self, observable=observables.CompositionalObservable([observables.RayObservable(num_rays=6, chans=[entities.Enemy]), observables.StateObservable(coordsAgent=False, speedAgent=False, coordsRelativeToAgent=True, coordsRewards=True, rewardsWhitelist=None, coordsEnemys=False, enemysWhitelist=None, enemysNoBarriers=True, rewardsTimeouts=False, include_rand=True)]), hide_map=False, fps=30, env_seed=None, aux_reward_max=10, enemy_damage=1, reward_reward=25, void_damage=1, **kw):
         super().__init__(
-            observable=observable,  fps=fps, env_seed=env_seed, aux_reward_max=aux_reward_max, **kw)
+            observable=observable,  fps=fps, env_seed=env_seed, aux_reward_max=aux_reward_max, void_damage=void_damage**kw)
         self.draw_entities = not hide_map
+        self._enemy_damage = enemy_damage
+        self._reward_reward = reward_reward
 
     def setup(self):
         self.agent.pos = self.start_pos
         for i in range(4 + math.floor(self.random()*4)):
             enemy = entities.CircleBarrier(self)
             enemy.radius = 30 + self.random()*70
+            enemy.damage = self._enemy_damage
             self.entities.append(enemy)
         for i in range(1):
             reward = entities.TeleportingReward(self)
             reward.radius = 30
-            reward.reward *= 2
+            reward.reward = self._reward_reward
             self.entities.append(reward)