diff --git a/.luacheckrc b/.luacheckrc
new file mode 100644
index 0000000..129bb9a
--- /dev/null
+++ b/.luacheckrc
@@ -0,0 +1,16 @@
+allow_defined_top = true
+
+globals = {
+	"controls",
+}
+
+read_globals = {
+	-- Stdlib
+	string = {fields = {"split"}},
+	table = {fields = {"copy", "getn"}},
+
+	-- Minetest
+	"minetest",
+	"vector", "ItemStack",
+	"dump"
+}
diff --git a/init.lua b/init.lua
index ba85aed..20157b4 100644
--- a/init.lua
+++ b/init.lua
@@ -19,14 +19,14 @@ end
 minetest.register_on_joinplayer(function(player)
 	local name = player:get_player_name()
 	controls.players[name] = {
-		jump={false}, 
-		right={false}, 
-		left={false}, 
-		LMB={false}, 
-		RMB={false}, 
-		sneak={false}, 
-		aux1={false}, 
-		down={false}, 
+		jump={false},
+		right={false},
+		left={false},
+		LMB={false},
+		RMB={false},
+		sneak={false},
+		aux1={false},
+		down={false},
 		up={false}
 	}
 end)
@@ -36,7 +36,7 @@ minetest.register_on_leaveplayer(function(player)
 	controls.players[name] = nil
 end)
 
-minetest.register_globalstep(function(dtime)
+minetest.register_globalstep(function()
 	for _, player in pairs(minetest.get_connected_players()) do
 		local player_name = player:get_player_name()
 		local player_controls = player:get_player_control()