Нас укрыли одеялом,и мы заснули крепко. на утро мы отправились в парк нам было весело!

We were covered by blanket and after it we fell asleep very tight.
In the morning we went to the park we had fun there

We were covered with a blanket and  fell asleep very soundly(tight).
In the morning we went to the park and had a lot of fun there.