It's a very clever aspiration to devise a new language not as something you hope everyone is going to switch to, but, as the OP states more of a test-bed to demonstrate a bunch of nice features, which you hope other people (that implement mainstream languages) will borrow/steal/copy. For instance, I very much appreciate the automatic parsing of command line arguments (and beyond just strings), which I hope the Rust folks will take over one day. Who would not like to skip all the boiler plate writing, but still offer decent cmd line options? For that reason, I will not compare the current Tomo feature set with any other language (as many other commenters do). But I will say that 150 lines for a complete terminal "snakes" game is pretty cool!

It's also smart to facilitate integration with C or other languages that have an abundance of libraries, because it's unlikely that you will create the momentum to rewrite everything in your facorite baby language.