Making an App Prototype without Coding

Hello,

Having only the most basic knowledge about programming I am thinking of a way to make at least an interactive Prototype of the App idea I have. Its 2D. The trouble is I cant use one of those Standard App Builders because I need some events like generating random numbers, a small database with examples that i can pick from as an user, a little piece of algorithm like subtraction of a price you paid from your bank account etc. So I am looking for an asset, that could provide me an easy possibility to define such events. I mean even if its some kind of easy script language like in Excel, that would be no problem. But writing a whole piece of Code in C# would take too much time to learn and is my ultima ratio.

Could you help me out with naming me some possibilities? I would be very greatful! I‘ve heard about playmaker and uscript, but I‘m not sure if I will be able to script the events mentioned above.

Thanks a lot!