I personally quite like that idea actually, gives you the time to do what you need to do with hopefully some less pressure. And add what you can and want if any. Sometimes things dont go as you hope afterall.
We all appreciate your hardwork. And those of us who keep track of the gaming industry know tight deadlines make bad games. Take your time to do it right. A good game later is much better than a bad game now.
Take all the time you need! I think most of us would prefer a more polished outcome at a later date than you stressing yourself to meet a deadline. Deadlines in videogames just make for bad games.