add resolution scaler

main.lua

@@ -21,6 +21,10 @@ GameObject = require 'obj/GameObject'
 Circle = require 'obj/game/Circle'
 
 function love.load()
+    -- screen setup
+    love.graphics.setDefaultFilter("nearest")
+    resize(2)
+
     ---@type Room|nil
     current_room = nil
 
@@ -114,3 +118,10 @@ function UUID()
     end
     return (("xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx"):gsub("[xy]", fn))
 end
+
+---Resize window
+---@param s number scale setting
+function resize(s)
+    love.window.setMode(s*gw, s*gh)
+    sx, sy = s, s
+end