I have been following bitwise since I saw a Clifford Wolf tweet about it. (Although I have not watched all the hours of video).
It is a set of videos that show how to build a complete hardware and software stack from scratch. It targets Risc-V as the instruction set. So far it has defined a new C-like language called ion and written a compiler for it (in C). The presenter, Per Vognsen, then wrote a Risc-V assembler, disassembler and simulator, in his new language, ion.. He then implemented Forth using the Risc-V assember. He then wrote a python framework for his own HDL. He is now getting on to the hardware design and is implementing a SoC with a Risc-V CPU, UART, VGA, PS/2 keyboard, etc, plus a few games written in the new HDL. The HDL compiles to Verilog, so this should all run on BlackIce, although he is not targeting icestorm FPGAs.
As he implements things in his HDL, I will attempt to get them running on BlackIce, so watch this space.