I would like to suggest the addition of trees which you can reap products from. For example you could have apple trees, pear trees, lemon trees, apricot trees, orange trees, nut trees (walnuts or hazelnuts) etc.

This could then provide more goods to be made like apple pie in the bakery, orange juice in the drinks factory, fruit tea in the tea factory, marmalade in the jam factory, sorbet in the ice cream factory, dried fruit in the snack factory or candied fruit in the candy factory.

This could then call for more factories to build such as a winery factory where wines and ciders could be made or a smoothie factory. This would also provide more uses for some of the products you can recieve from the island such as the bananas, coconuts and watermelons.