diff --git a/external/GoUI b/external/GoUI
index 2376300..b68222d 160000
--- a/external/GoUI
+++ b/external/GoUI
@@ -1 +1 @@
-Subproject commit 237630054b0d2fcab327cd271573d769c03f593b
+Subproject commit b68222dab7a766ede897ba9bdc68f262e2194e3d
diff --git a/public/js/Go.js b/public/js/Go.js
index dbed955..c7d4c76 100644
--- a/public/js/Go.js
+++ b/public/js/Go.js
@@ -9326,22 +9326,6 @@ var _user$project$Go_Util$zip = F2(
 			return {ctor: '[]'};
 		}
 	});
-var _user$project$Go_Util$allIndices = function (n) {
-	var pairs = F2(
-		function (xs, i) {
-			return A2(
-				_elm_lang$core$List$map,
-				function (x) {
-					return {ctor: '_Tuple2', _0: i, _1: x};
-				},
-				xs);
-		});
-	var vals = A2(_elm_lang$core$List$range, 0, n - 1);
-	return A2(
-		_elm_lang$core$List$concatMap,
-		pairs(vals),
-		vals);
-};
 var _user$project$Go_Util$lookup = F2(
 	function (val, list) {
 		return A2(
@@ -9351,8 +9335,10 @@ var _user$project$Go_Util$lookup = F2(
 				A2(
 					_elm_lang$core$List$filter,
 					function (_p1) {
-						var _p2 = _p1;
-						return _elm_lang$core$Native_Utils.eq(_p2._0, val);
+						return function (a) {
+							return _elm_lang$core$Native_Utils.eq(a, val);
+						}(
+							_elm_lang$core$Tuple$first(_p1));
 					},
 					list)));
 	});
@@ -9360,6 +9346,20 @@ var _user$project$Go_Util$pair = F2(
 	function (a1, a2) {
 		return {ctor: '_Tuple2', _0: a1, _1: a2};
 	});
+var _user$project$Go_Util$allIndices = function (n) {
+	var pairs = F2(
+		function (xs, i) {
+			return A2(
+				_elm_lang$core$List$map,
+				_user$project$Go_Util$pair(i),
+				xs);
+		});
+	var vals = A2(_elm_lang$core$List$range, 0, n - 1);
+	return A2(
+		_elm_lang$core$List$concatMap,
+		pairs(vals),
+		vals);
+};
 
 var _user$project$Go_Decoders$decodeColor = function () {
 	var tryDecode = function (s) {
@@ -9522,10 +9522,11 @@ var _user$project$Go_View$renderBoard = F2(
 		var cells = A2(
 			_elm_lang$core$List$map,
 			function (i) {
-				return A2(
-					_user$project$Go_Util$pair,
-					i,
-					A2(_user$project$Go_Util$lookup, i, board));
+				return {
+					ctor: '_Tuple2',
+					_0: i,
+					_1: A2(_user$project$Go_Util$lookup, i, board)
+				};
 			},
 			_user$project$Go_Util$allIndices(size));
 		return A2(
diff --git a/src/Go.cr b/src/Go.cr
index c6592a4..12cfbd6 100644
--- a/src/Go.cr
+++ b/src/Go.cr
@@ -33,7 +33,7 @@ def handle_message(id, game, socket, message)
         color = split_command[3] == "Black" ? Go::Color::Black : Go::Color::White
 
         game.update(x, y, color)
-        game.sockets.each { |socket| socket.send game.to_string }
+        game.sockets.each { |socket| socket.send game.to_json }
     end
 end
 
@@ -51,9 +51,9 @@ post "/game" do |env|
         size = game.size.value
         black = nil
 
-        if game_password == game.blackPass
+        if game_password == game.black_pass
             black = true
-        elsif game_password == game.whitePass
+        elsif game_password == game.white_pass
             black = false
         end
 
@@ -102,7 +102,7 @@ end
 ws "/game/:id" do |socket, env|
     game_id = env.params.url["id"]
     if game = lookup_game(nil, GAME_CACHE, game_id)
-        socket.send game.to_string
+        socket.send game.to_json
         game.sockets << socket
 
         socket.on_message do |message|
diff --git a/src/Go/Game.cr b/src/Go/Game.cr
index 2d0018a..546bb6f 100644
--- a/src/Go/Game.cr
+++ b/src/Go/Game.cr
@@ -14,13 +14,13 @@ module Go
 
     class Game
         property size : Size
-        property blackPass : String
-        property whitePass : String
+        property black_pass : String
+        property white_pass : String
         property board  : Board
         property turn : Color
         property sockets : Array(HTTP::WebSocket)
 
-        def initialize(size : Size, @blackPass, @whitePass)
+        def initialize(size : Size, @black_pass, @white_pass)
             @size = size
             @board = Board.new
             @turn = Color::Black
@@ -47,7 +47,7 @@ module Go
             end
         end
 
-        def to_string
+        def to_json
             JSON.build do |json|
                 json.object do
                     json.field "turn", @turn.to_s
@@ -57,11 +57,12 @@ module Go
         end
 
         private def count_neighbors(x, y, color, visited)
-            if visited.includes?({x, y}) || (x < 0 || x >= @size.value || y < 0 || y >= @size.value)
+            coord = {x, y}
+            if visited.includes?(coord) || (x < 0 || x >= @size.value || y < 0 || y >= @size.value)
                 return 0
             else
-                visited.push({x, y})
-                case @board[{x, y}]?
+                visited.push(coord)
+                case @board[coord]?
                 when color
                     return count_neighbors(x - 1, y, color, visited) + 
                         count_neighbors(x + 1, y, color, visited) +
@@ -77,8 +78,9 @@ module Go
         end
 
         private def remove_color(x, y, color)
-            if !(x < 0 || x >= @size.value || y < 0 || y >= @size.value) && @board[{x, y}]? == color
-                @board.delete({x, y})
+            coord = {x, y}
+            if !(x < 0 || x >= @size.value || y < 0 || y >= @size.value) && @board[coord]? == color
+                @board.delete(coord)
                 remove_color(x - 1, y, color)
                 remove_color(x + 1, y, color)
                 remove_color(x, y - 1, color)
@@ -87,7 +89,8 @@ module Go
         end
 
         private def try_remove_branch(x, y, color)
-            if @board[{x, y}]? == color
+            coord = {x, y}
+            if @board[coord]? == color
                 neighbor_count = count_neighbors(x, y, color, [] of Tuple(Int8, Int8))
                 if neighbor_count == 0
                     remove_color(x, y, color)
@@ -100,8 +103,9 @@ module Go
         end
 
         def update(x, y, color)
+            coord = {x, y}
             if @turn == color
-                @board[{x, y}] = color
+                @board[coord] = color
                 new_color = invert(color)
                 try_remove_branch(x - 1, y, new_color)
                 try_remove_branch(x + 1, y, new_color)