Ask HN: Our prototype is ready (a visual programming tool). How to proceed?

Since the beginning of 2018 we have been creating a visual programming tool we call "Slang" (short for stream language). Now finally, there is a downloadable version and some example applications. It is free and open source.

But, here is our problem: we don't really know what our target group is. Slang is very powerful and universal (just like any programming language) and in our opinion it is easier and faster to use in a lot of scenarios. But there is just not this one apparent use case where it stands out.

We would very much like your feedback to improve Slang and make it more usable. So my question is: how can we approach this? Of course I hope some potential users hang around here, so if you have feedback we would very much appreciate it.

Here's our website: https://tryslang.com