Any Refrigerator repair men out there who know what's wrong with my fridge?

A brownish colored sticky substance always collects in the bottom of the fridge. It's not any of the food that has spilled it's always the same brown stuff. Also in the last year it drips water from the inside top and gets a huge frozen block of ice oround the top back and the freezer ices up like the artic and every time I open it ice falls all over. I have to defrost the whole thing every couple months and it's a huge time consuming messy pain! I know the floor is not level under the fridge because the brown stuff collects in the right back corner. The little feet that adjust on the fridge dont adjust enough to fix it. Could this be the root of the problem?