^ What julia said. You may want to try patting the tofu dry before dipping it into the flour+water mixture so it sticks better. Egg replacer will not work in this case, it only binds during baking... it's not sticky enough otherwise.
Do you have a wheat free recipe?
Yeah, open the package of tofu, insert fork.
You could probably get a pretty good fried tofu going by coating it in chickpea flour-based batter. Chickpea flour tastes kinda nasty until it's cooked so don't be too discouraged if the batter tastes funny.