Suggestions to improve

Best parchisi game I have found so far but adding some options would make it more strategic and less based on luck:
1. Add pass button so player can choose to only use one of dice thrown
2. If dice total 5 then option to get out of base available
3. Dont make it mandatory to leave base when 5 or total of 5 thrown (allow player to use 5 on another piece even if there are still pieces in base)
4. Undo button to reverse mistakes

Anglewand about Parcheesi by Quiles, v2.2