Add project files.

FreedomFighter/OmegaInput.cs

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+using Microsoft.Xna.Framework.Input;
+
+namespace FreedomFighter;
+
+/// <summary>
+/// Replacement for TOmegaInput's keyboard state sets, with the key assignments
+/// from GameU.dfm: B1=Space, B2=Esc, B3=Enter, B4=RCtrl, B5=1, B6=2, B7=3, B8=M.
+/// "States" = held; "StatesClicked" = pressed this frame.
+/// </summary>
+public class OmegaInput
+{
+    KeyboardState _prev;
+    KeyboardState _cur;
+
+    public void Update()
+    {
+        _prev = _cur;
+        _cur = Keyboard.GetState();
+    }
+
+    bool Held(Keys k) => _cur.IsKeyDown(k);
+    bool Clicked(Keys k) => _cur.IsKeyDown(k) && _prev.IsKeyUp(k);
+
+    public bool Up => Held(Keys.Up);
+    public bool Down => Held(Keys.Down);
+    public bool Left => Held(Keys.Left);
+    public bool Right => Held(Keys.Right);
+    public bool Button4 => Held(Keys.RightControl) || Held(Keys.LeftControl);
+    public bool Button8 => Held(Keys.M);
+
+    public bool UpClicked => Clicked(Keys.Up);
+    public bool DownClicked => Clicked(Keys.Down);
+    public bool Button1Clicked => Clicked(Keys.Space);
+    public bool Button2Clicked => Clicked(Keys.Escape);
+    public bool Button3Clicked => Clicked(Keys.Enter);
+    public bool Button5Clicked => Clicked(Keys.D1) || Clicked(Keys.NumPad1);
+    public bool Button6Clicked => Clicked(Keys.D2) || Clicked(Keys.NumPad2);
+    public bool Button7Clicked => Clicked(Keys.D3) || Clicked(Keys.NumPad3);
+    public bool PauseClicked => Clicked(Keys.Pause);
+
+    public KeyboardState Current => _cur;
+    public KeyboardState Previous => _prev;
+}