It would be easier if you could choose the number of resources you wanna exchange........otherwise you wouldn't have to spend hours clicking + repeatedly... ._.
Yeah what Matsteo said. Make it in space, replace the line of blocks with a totally freaky alien and the food would be metal chunks he eats to grow. Enemies would be fun, like chasing you everywhere and every 5 levels, 1 comes. And dont forget to update the glitch where you cant see your score. =p