diff --git a/projects/challenge/smart_contracts/artifacts/counter/client.py b/projects/challenge/smart_contracts/artifacts/counter/client.py
index a9f740e..6181d0f 100644
--- a/projects/challenge/smart_contracts/artifacts/counter/client.py
+++ b/projects/challenge/smart_contracts/artifacts/counter/client.py
@@ -30,8 +30,8 @@
         }
     },
     "source": {
-        "approval": "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",
-        "clear": "I3ByYWdtYSB2ZXJzaW9uIDEwCgpzbWFydF9jb250cmFjdHMuY291bnRlci5jb250cmFjdC5Db3VudGVyLmNsZWFyX3N0YXRlX3Byb2dyYW06CiAgICAvLyBzbWFydF9jb250cmFjdHMvY291bnRlci9jb250cmFjdC5weToyNAogICAgLy8gY2xhc3MgQ291bnRlcihBUkM0Q29udHJhY3QpOgogICAgaW50IDEKICAgIHJldHVybgo="
+        "approval": "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",
+        "clear": "I3ByYWdtYSB2ZXJzaW9uIDEwCgpzbWFydF9jb250cmFjdHMuY291bnRlci5jb250cmFjdC5Db3VudGVyLmNsZWFyX3N0YXRlX3Byb2dyYW06CiAgICAvLyBzbWFydF9jb250cmFjdHMvY291bnRlci9jb250cmFjdC5weTozCiAgICAvLyBjbGFzcyBDb3VudGVyKEFSQzRDb250cmFjdCk6CiAgICBpbnQgMQogICAgcmV0dXJuCg=="
     },
     "state": {
         "global": {
@@ -46,9 +46,9 @@
     "schema": {
         "global": {
             "declared": {
-                "counter": {
+                "counters": {
                     "type": "uint64",
-                    "key": "counter"
+                    "key": "counters"
                 }
             },
             "reserved": {}
@@ -163,7 +163,7 @@ def method() -> str:
 
 class GlobalState:
     def __init__(self, data: dict[bytes, bytes | int]):
-        self.counter = typing.cast(int, data.get(b"counter"))
+        self.counters = typing.cast(int, data.get(b"counters"))
 
 
 class LocalState:
diff --git a/projects/challenge/smart_contracts/counter/contract.py b/projects/challenge/smart_contracts/counter/contract.py
index d50930a..95be568 100644
--- a/projects/challenge/smart_contracts/counter/contract.py
+++ b/projects/challenge/smart_contracts/counter/contract.py
@@ -1,21 +1,25 @@
 # pyright: reportMissingModuleSource=false
 from algopy import ARC4Contract, LocalState, GlobalState, UInt64, Txn, arc4, Global
 
-
 class Counter(ARC4Contract):
 
-    count: LocalState[UInt64]
-    counters: GlobalState[UInt64]
+    def __init__(self) -> None:
+        # Initialize instance variables
+        self.count = LocalState(UInt64)
+        self.counters = GlobalState(UInt64)
 
     @arc4.baremethod(allow_actions=["OptIn"])
     def opt_in(self) -> None:
+        # Ensure sender is recorded in local state
         self.count[Txn.sender] = UInt64(0)
         self.counters.value += 1
 
     @arc4.abimethod()
     def increment(self) -> arc4.UInt64:
-        assert Txn.sender.is_opted_in(
-            Global.current_application_id
-        ), "Sender must opt-in to the contract"
+        # Check sender is opted into the application
+        assert Txn.sender.is_opted_in(Global.current_application_id), "Sender must opt-in to the contract"
+        
+        # Increment the local count
         self.count[Txn.sender] += 1
         return arc4.UInt64(self.count[Txn.sender])
+