Flynn, who watched Rob Jones and Chris Brown find the net in either half, has only been given a contract until the end of the season.
But he said: "The length of contracts has never concerned me. It's only a piece of paper. I've got big plans for the club - this season and next season.
"The chairman has already said he wants to win the title so no pressure there. But I agree with him. We're in a good position, joint top with a game in hand, and I've never liked to settle for second best.
"It was nice to kick-off with a win but I've inherited a good side here. The teamwork is superb, but maybe we can get a bit more from the players individually."
The game went ahead after a massive snow clearing operation at the Keepmoat Stadium.
And Orient manager Russell Slade said: "It might have been better for us had it been off. We had a cup game with extra-time during the week and I had to make changes to freshen things up a little bit.
"The pitch was a little bit tricky in places but there are no excuses. It was perfectly playable and they played on it much better than us.
"Doncaster are the benchmark for this division. They are a good side but, having said that, we were only behind by a goal at the interval to a set-play.
"The second goal we tried to play for offside and it didn't come off and we have to learn from our mistakes."
- Sports & Recreation