diff --git a/src/game.zig b/src/game.zig
index bebd2f7..0a05cb2 100644
--- a/src/game.zig
+++ b/src/game.zig
@@ -32,11 +32,12 @@ rotate_right_action: bool = false,
 rotate_left_action: bool = false,
 
 pub fn init(_renderer: *SDL.SDL_Renderer) Self {
+
     var ret = Self{
         .grid = Grid.init(),
-        .grid_cell_size = 16,
-        .grid_pos_x = 200,
-        .grid_pos_y = -50,
+        .grid_cell_size = undefined,
+        .grid_pos_x = undefined,
+        .grid_pos_y = undefined,
 
         .bag = Bag.init(),
         .piece = undefined,
@@ -44,6 +45,16 @@ pub fn init(_renderer: *SDL.SDL_Renderer) Self {
         .held = null,
         .renderer = _renderer,
     };
+    var aux_w: i32 = undefined;
+    var aux_h: i32 = undefined;
+
+    _ = SDL.SDL_GetRendererOutputSize(_renderer, &aux_w, &aux_h);
+
+    ret.grid_cell_size = @divFloor(@minimum(aux_w, aux_h), 32);
+
+    ret.grid_pos_x = @divFloor(aux_w, 2) - (ret.grid_cell_size * @divFloor(Grid.ncolumns, 2));
+    ret.grid_pos_y = @divFloor(aux_h, 2) - (ret.grid_cell_size * @divFloor(Grid.nrows + Grid.buffer, 2));
+
     ret.piece = ret.bag.pop();
     // ret.shadow = movement.shadow(ret.grid, ret.piece);
     // ret.shadow.color.a /= 2;
diff --git a/src/main.zig b/src/main.zig
index 658c6bb..85ec9fa 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -18,8 +18,8 @@ pub fn main() !void {
         "USG",
         SDL.SDL_WINDOWPOS_CENTERED,
         SDL.SDL_WINDOWPOS_CENTERED,
-        640,
-        480,
+        1280,
+        720,
         SDL.SDL_WINDOW_SHOWN,
     ) orelse return;
     defer _ = SDL.SDL_DestroyWindow(window);