Fix a typo in gym/utils/play.py
diff --git a/gym/utils/play.py b/gym/utils/play.py
index 592ae67d066..694089ec129 100644
--- a/gym/utils/play.py
+++ b/gym/utils/play.py
@@ -65,7 +65,7 @@ def callback(obs_t, obs_tp1, rew, done, info):
             obs_tp1: observation after performing action
             action: action that was executed
             rew: reward that was received
-            done: whether the environemnt is done or not
+            done: whether the environment is done or not
             info: debug info
     keys_to_action: dict: tuple(int) -> int or None
         Mapping from keys pressed to action performed.
