Use two dimensional array in map

spec/world_spec.cr

@@ -4,7 +4,7 @@ require "../src/game/world"
 describe "World" do
   it "should build crystal harvester" do
     world = Game::World.new
-    point = Game::Point.new(2, 3)
+    point = Game::Point.new 2, 3
     cmd = Game::BuildCrystalHarvesterCommand.new(point)
     world.push(cmd)
     world.run(100)
@@ -13,7 +13,7 @@ describe "World" do
 
   it "should fail when not enought resources" do
     world = Game::World.new
-    point = Game::Point.new(2, 3)
+    point = Game::Point.new 2, 3
     cmd = Game::BuildCrystalRestorerCommand.new(point)
     expect_raises(Game::NotEnoughtResources) do
       world.push(cmd)