Drain pineapple, reserving juice.
In medium bowl mix sugar and flour.
Add water to reserved juice to make 2/3 cup.
Stir juice into sugar mixture until smooth.
Add pineapple and cheese.
Pour into a greased 1 quart casserole dish.
Mix crushed crackers and butter.
Sprinkle on top of casserole.
Bake in pre-heated 350-degree oven for 20 to 25 minutes until top is golden brown