Make screen reasonably sized.

danmaku/Base.lproj/MainMenu.xib

@@ -671,14 +671,14 @@
         <window title="DanmakuRPG" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" releasedWhenClosed="NO" animationBehavior="default" id="QvC-M9-y7g" customClass="GameWindow">
             <windowStyleMask key="styleMask" titled="YES" closable="YES" miniaturizable="YES" resizable="YES"/>
             <windowPositionMask key="initialPositionMask" leftStrut="YES" rightStrut="YES" topStrut="YES" bottomStrut="YES"/>
-            <rect key="contentRect" x="172" y="119" width="1600" height="900"/>
+            <rect key="contentRect" x="0.0" y="0.0" width="1200" height="700"/>
             <rect key="screenRect" x="0.0" y="0.0" width="1440" height="877"/>
             <view key="contentView" id="EiT-Mj-1SZ">
-                <rect key="frame" x="0.0" y="0.0" width="1600" height="900"/>
+                <rect key="frame" x="0.0" y="0.0" width="1200" height="700"/>
                 <autoresizingMask key="autoresizingMask"/>
                 <subviews>
                     <openGLView fixedFrame="YES" useAuxiliaryDepthBufferStencil="NO" useDoubleBufferingEnabled="YES" allowOffline="YES" translatesAutoresizingMaskIntoConstraints="NO" id="9rQ-QQ-4fS" customClass="GameView">
-                        <rect key="frame" x="0.0" y="0.0" width="1600" height="900"/>
+                        <rect key="frame" x="0.0" y="0.0" width="1200" height="700"/>
                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                     </openGLView>
                 </subviews>