diff --git a/main.lua b/main.lua
index 8820ecc..2232ea2 100644
--- a/main.lua
+++ b/main.lua
@@ -1,6 +1,7 @@
 require 'grid'
 require 'point'
 require 'line'
+require 'mouse'
 
 function love.load()
     love.graphics.setLineStyle( Config.lineStyle )
@@ -26,71 +27,12 @@ function love.load()
     )
     GameGrid:push( line2 )
 
-    ---@class Mouse
-    ---@field lastLine Line?
-    ---@field lastPoint Point?
-    Mouse = {
-        x = 0,
-        y = 0,
-        pressed = false,
-        lastPressed = false,
-        startX = -1,
-        startY = -1,
-        dragged = false,
-        lastLine = nil,
-        lastPoint = nil,
-        point = Point:new( 0, 0 )
-    }
-end
+    end
 
 -- TODO: move input interactions into module
 -- TODO: fix collision with other line's endpoint
 function love.update( dt )
-    Mouse.x, Mouse.y = love.mouse.getPosition()
-    Mouse.x = Mouse.x + 1
-    Mouse.y = Mouse.y + 1
-    Mouse.lastPoint = Mouse.point
-    Mouse.lastPressed = Mouse.pressed
-    Mouse.pressed = love.mouse.isDown( 1 )
-    Mouse.point = GridPoint.snapCoords( Point:new( Mouse.x, Mouse.y ) )
-    if Mouse.lastLine ~= nil then
-        local pointsLen = #Mouse.lastLine.points
-        local lastLinePoint = Mouse.lastLine.points[pointsLen]
-        if Mouse.point:distanceTo( lastLinePoint ) == 1
-            and GameGrid:inBounds( Mouse.point )
-            and GameGrid:matchesLine( Mouse.point, true ) == nil
-            and not lastLinePoint:equals( Mouse.lastLine.endpoint )
-            and not GameGrid:isOtherEndpoint( Mouse.lastLine, Mouse.point ) then
-            Mouse.lastLine:push( Mouse.point )
-        elseif Mouse.lastLine:has( Mouse.point )
-            and not Mouse.point:equals( lastLinePoint ) then
-            while not Mouse.lastLine.points[#Mouse.lastLine.points]:equals( Mouse.point ) do
-                Mouse.lastLine:pop()
-            end
-        end
-    end
-
-
-    Mouse.dragged = Mouse.pressed
-        and Mouse.startX > 0
-        and Point.distanceTo (
-            Point:new( Mouse.x, Mouse.y ),
-            Point:new( Mouse.startX, Mouse.startY )
-        ) > Config.dragSensivity
-
-    if not Mouse.pressed and Mouse.startX > 0 then
-        Mouse.startX = -1
-        Mouse.startY = -1
-        Mouse.lastLine = nil
-    end
-
-    if not Mouse.lastPressed
-        and Mouse.pressed
-        and Mouse.startX < 0 then
-        Mouse.startX = Mouse.x
-        Mouse.startY = Mouse.y
-        Mouse.lastLine = GameGrid:matchesLine( Mouse.point, false )
-    end
+    Mouse:update()
 end
 
 function love.draw()
diff --git a/mouse.lua b/mouse.lua
new file mode 100644
index 0000000..af2ba94
--- /dev/null
+++ b/mouse.lua
@@ -0,0 +1,74 @@
+-- TODO: rewrite
+---@class Mouse
+---@field x integer
+---@field y integer
+---@field pressed boolean
+---@field lastPressed boolean
+---@field startX integer
+---@field startY integer
+---@field dragged boolean
+---@field lastLine Line?
+---@field lastPoint GridPoint?
+---@field point GridPoint
+Mouse = {
+    x = 0,
+    y = 0,
+    pressed = false,
+    lastPressed = false,
+    startX = -1,
+    startY = -1,
+    dragged = false,
+    lastLine = nil,
+    lastPoint = nil,
+    point = GridPoint:new( 0, 0 )
+}
+
+-- TODO: fix collision with other line's endpoint
+function Mouse:update()
+    Mouse.x, Mouse.y = love.mouse.getPosition()
+    Mouse.x = Mouse.x + 1
+    Mouse.y = Mouse.y + 1
+    Mouse.lastPoint = Mouse.point
+    Mouse.lastPressed = Mouse.pressed
+    Mouse.pressed = love.mouse.isDown( 1 )
+    Mouse.point = GridPoint.snapCoords( Point:new( Mouse.x, Mouse.y ) )
+    if Mouse.lastLine ~= nil then
+        local pointsLen = #Mouse.lastLine.points
+        local lastLinePoint = Mouse.lastLine.points[pointsLen]
+        if Mouse.point:distanceTo( lastLinePoint ) == 1
+            and GameGrid:inBounds( Mouse.point )
+            and GameGrid:matchesLine( Mouse.point, true ) == nil
+            and not lastLinePoint:equals( Mouse.lastLine.endpoint )
+            and not GameGrid:isOtherEndpoint( Mouse.lastLine, Mouse.point ) then
+            Mouse.lastLine:push( Mouse.point )
+        elseif Mouse.lastLine:has( Mouse.point )
+            and not Mouse.point:equals( lastLinePoint ) then
+            while not Mouse.lastLine.points[#Mouse.lastLine.points]:equals( Mouse.point ) do
+                Mouse.lastLine:pop()
+            end
+        end
+    end
+
+
+    Mouse.dragged = Mouse.pressed
+        and Mouse.startX > 0
+        and Point.distanceTo (
+            Point:new( Mouse.x, Mouse.y ),
+            Point:new( Mouse.startX, Mouse.startY )
+        ) > Config.dragSensivity
+
+    if not Mouse.pressed and Mouse.startX > 0 then
+        Mouse.startX = -1
+        Mouse.startY = -1
+        Mouse.lastLine = nil
+    end
+
+    if not Mouse.lastPressed
+        and Mouse.pressed
+        and Mouse.startX < 0 then
+        Mouse.startX = Mouse.x
+        Mouse.startY = Mouse.y
+        Mouse.lastLine = GameGrid:matchesLine( Mouse.point, false )
+    end
+
+end