Could I use something else instead of cream?

Yes, it really doesn't matter.

Yes, but you may need more flour than what the recipe calls for in cornstarch. The cornstarch is just used to thicken the sauce; flour will also thicken the sauce,...

You may be able to use cornstarch, or perhaps even baby powder if your are desperate.

Any type of safe fruits or veggies should work fine, just keep in mind that softer and/or heavier foods will be harder to keep on a string.

This knotting technique can be used with nearly every type or cord or string, but in order to make a real paracord lanyard, you must use paracord.

You can use a tarp or any plastic sheeting, just be sure the material is strong and won't tear.

Yes, if you like the flavor of cream cheese. However, you will have to heat the coffee up enough to melt the cheese so that you can properly mix it...