diff --git a/grid.lua b/grid.lua
index e201477..5faeab4 100644
--- a/grid.lua
+++ b/grid.lua
@@ -1,4 +1,3 @@
-require 'tablefuncs'
 require 'config'
 require 'point'
 
@@ -107,3 +106,16 @@ end
 function Grid:inBounds( point )
     return point.x <= self.size.x and point.y <= self.size.y
 end
+
+-- Checks if all lines have been connected and all dots are fulfilled
+---@return boolean
+function Grid:isCompleted()
+    local requiredCount, totalCount = self.size.x * self.size.y, 0
+    for _, line in ipairs( self.lines ) do
+        if not line:endpointsConnected() then
+            return false
+        end
+        totalCount = totalCount + #line.points
+    end
+    return totalCount == requiredCount
+end
diff --git a/levels/test.lua b/levels/test.lua
new file mode 100644
index 0000000..507f0c3
--- /dev/null
+++ b/levels/test.lua
@@ -0,0 +1,9 @@
+return {
+    width = 5,
+    height = 5,
+    lines = {
+        { 1, 1, 3, 3, "green" },
+        { 1, 5, 5, 2, "red" },
+        { 2, 5, 5, 3, "blue" }
+    }
+}
diff --git a/levels/test2.lua b/levels/test2.lua
new file mode 100644
index 0000000..b7fb17b
--- /dev/null
+++ b/levels/test2.lua
@@ -0,0 +1,9 @@
+return {
+    width = 4,
+    height = 4,
+    lines = {
+        { 1, 1, 2, 2, "red" },
+        { 4, 1, 4, 4, "green" },
+        { 1, 2, 1, 4, "blue" }
+    }
+}
diff --git a/line.lua b/line.lua
index f992bcb..4208a66 100644
--- a/line.lua
+++ b/line.lua
@@ -8,7 +8,6 @@ require 'gridpoint'
 ---@field points GridPoint[]
 ---@field color Color
 Line = {
-
     startpoint = GridPoint:new( GridPoint:coords() ),
     endpoint = GridPoint:new( GridPoint:coords() ),
     points = { },
@@ -95,3 +94,8 @@ function Line:has( point )
         end
     )
 end
+
+-- Check if line's endpoints are connected
+function Line:endpointsConnected()
+    return self.points[#self.points]:equals( self.endpoint )
+end
diff --git a/main.lua b/main.lua
index 2232ea2..93d81f9 100644
--- a/main.lua
+++ b/main.lua
@@ -2,35 +2,15 @@ require 'grid'
 require 'point'
 require 'line'
 require 'mouse'
+require 'makegrid'
 
 function love.load()
     love.graphics.setLineStyle( Config.lineStyle )
     love.graphics.setLineWidth( Config.lineWidth )
 
-    GameGrid = Grid:new( Point:new( 5, 5 ) )
-    local line = Line:new(
-        GridPoint:new( 1, 1 ),
-        GridPoint:new( 3, 3 ),
-        Color.red
-    )
-    GameGrid:push( line )
-    local line1 = Line:new(
-        GridPoint:new( 1, 5 ),
-        GridPoint:new( 5, 2 ),
-        Color.green
-    )
-    GameGrid:push( line1 )
-    local line2 = Line:new(
-        GridPoint:new( 2, 5 ),
-        GridPoint:new( 5, 3 ),
-        Color.blue
-    )
-    GameGrid:push( line2 )
+    GameGrid = MakeGrid( require 'levels/test2' )
+end
 
-    end
-
--- TODO: move input interactions into module
--- TODO: fix collision with other line's endpoint
 function love.update( dt )
     Mouse:update()
 end
@@ -45,6 +25,10 @@ function love.draw()
         love.graphics.print( "drag", 64, 300 )
     end
     if Mouse.lastLine ~= nil then
-            love.graphics.print( tostring( Mouse.lastLine ), 128, 300 )
+        love.graphics.print( tostring( Mouse.lastLine ), 128, 300 )
+    end
+
+    if GameGrid:isCompleted() then
+        love.graphics.print( "Grid completed", 64, 320 )
     end
 end
diff --git a/makegrid.lua b/makegrid.lua
new file mode 100644
index 0000000..c1a6747
--- /dev/null
+++ b/makegrid.lua
@@ -0,0 +1,39 @@
+require 'grid'
+require 'line'
+require 'point'
+
+-- Constructs line from { start x, start y, end x, end y, color }
+---@param table table
+---@return Line
+local function makeLine( table )
+    local startpoint = GridPoint:new( table[1], table[2] )
+    local endpoint = GridPoint:new( table[3], table[4] )
+    return Line:new( startpoint, endpoint, Color[table[5]] )
+end
+
+-- Constructs all game objects using data table
+--  table = {
+--      -- Size
+--      width = 5,
+--      height = 5,
+--      -- Lines
+--      lines = {
+--          -- start x, start y, end x, end y, color
+--          { 1, 1, 3, 3, "red" },
+--          { 1, 5, 5, 2, "green" },
+--          { 2, 5, 5, 3, "blue" }
+--      }
+--  }
+---@param table table
+---@return Grid
+function MakeGrid( table )
+    local size = Point:new( table.width, table.height )
+    local grid = Grid:new( size )
+
+    for _, lineData in ipairs( table.lines ) do
+        local line = makeLine( lineData )
+        grid:push( line )
+    end
+
+    return grid
+end