diff --git a/columbus/env.py b/columbus/env.py
index 922a6fb..00f8bc7 100644
--- a/columbus/env.py
+++ b/columbus/env.py
@@ -431,6 +431,26 @@ class ColumbusEasierObstacles(ColumbusEnv):
             self.entities.append(enemy)
 
 
+class ColumbusComp(ColumbusEnv):
+    def __init__(self, observable=observables.CompositionalObservable([observables.RayObservable(num_rays=6, chans=[entities.Enemy]), observables.StateObservable(coordsAgent=True, speedAgent=False, coordsRelativeToAgent=False, coordsRewards=True, rewardsWhitelist=None, coordsEnemys=False, enemysWhitelist=None, enemysNoBarriers=True, rewardsTimeouts=False, include_rand=True)]), hide_map=False, fps=30, env_seed=None):
+        super().__init__(
+            observable=observable,  fps=fps, env_seed=env_seed)
+        self.draw_entities = not hide_map
+        self.aux_reward_max = 10
+
+    def setup(self):
+        self.agent.pos = self.start_pos
+        for i in range(5):
+            enemy = entities.CircleBarrier(self)
+            enemy.radius = 30 + self.random()*70
+            self.entities.append(enemy)
+        for i in range(3):
+            reward = entities.TeleportingReward(self)
+            reward.radius = 30
+            reward.reward *= 2
+            self.entities.append(reward)
+
+
 class ColumbusJustState(ColumbusEnv):
     def __init__(self, observable=observables.StateObservable(), fps=30, num_enemies=0, num_rewards=1, env_seed=None):
         super(ColumbusJustState, self).__init__(
@@ -573,3 +593,9 @@ register(
     entry_point=ColumbusFootball,
     max_episode_steps=30*60*2,
 )
+
+register(
+    id='ColumbusComb-v0',
+    entry_point=ColumbusComp,
+    max_episode_steps=30*60*2,
+)
diff --git a/columbus/observables.py b/columbus/observables.py
index a3135d4..37b9c12 100644
--- a/columbus/observables.py
+++ b/columbus/observables.py
@@ -259,3 +259,43 @@ class StateObservable(Observable):
                                (0, y*self.env.height+ofs[0]), 1, width=0)
             pygame.draw.circle(self.env.screen, col,
                                (x*self.env.width+ofs[1], 0), 1, width=0)
+
+
+class CompositionalObservable(Observable):
+    def __init__(self, observables):
+        super().__init__()
+        self.observables = observables
+
+    def get_observation_space(self):
+        num = 0
+        low = 99999
+        high = -99999
+        for i, obs in enumerate(self.observables):
+            space = obs.get_observation_space()
+            num += math.prod(space.shape)
+            low = min(low, float(space.low[0]))
+            high = max(high, float(space.high[0]))
+            if False:
+                if not i:
+                    low = space.low
+                    high = space.high
+                else:
+                    low = np.vstack((low, space.low))
+                    high = np.vstack((high, space.high))
+        return spaces.Box(low=low, high=high,
+                          shape=(num,), dtype=np.float32)
+
+    def get_observation(self):
+        o = [float(point)
+             for obs in self.observables for point in obs.get_observation()]
+        o = np.array(o)
+        return o
+
+    def draw(self):
+        for obs in self.observables:
+            obs.draw()
+
+    def _set_env(self, env):
+        #self.env = env
+        for obs in self.observables:
+            obs._set_env(env)