Grab fallen saplings, fix bugs

bot.py

@@ -6,6 +6,7 @@ import os
 import time
 import importlib
 from math import floor, ceil
+from copy import copy
 
 USERNAME = os.environ['USERNAME']
 PASSWORD = os.environ['PASSWORD']
@@ -61,7 +62,7 @@ def tick(global_state):
 
     ########## object physics ##########
 
-    for eid, obj in g.objects.items():
+    for eid, obj in copy(g.objects).items():
         start_x = obj.x
 
         if obj.velocity_x: