diff --git a/init.lua b/init.lua
index c50914b..be6123c 100644
--- a/init.lua
+++ b/init.lua
@@ -8,7 +8,7 @@ local state = STATE_LIST
 
 local modules        = {}    -- [{id, version, name, rect={x,y,w,h}}]
 local quit_buttons   = {}    -- {yes = rect, no = rect}
-local screen_w, screen_h = 1280, 720   -- matched ENGINE_WINDOW_DEFAULT_WIDTH/HEIGHT
+local screen_w, screen_h   -- queried in init() via engine.window.size() (P.3.5)
 
 -- CI-conditional self-exit (matches spine-prototype's pattern).
 -- Interactive runs (no SPOREL_CI=1) loop until ESC or quit-confirm.
@@ -36,6 +36,7 @@ local COLOR_MODAL  = 0x303030FF
 local hit = engine.spatial.aabb_contains_point
 
 function init(ctx)
+    screen_w, screen_h = engine.window.size()
     local list = engine.module.list()
     local y = 80
     for i, m in ipairs(list) do