ok, this got a bit more interesting.
Flow & Logo are good tools but a little dated hence very heavy for anything remotly IoT including our Pokitto. Scratch I thought was made by the Logo creators and was the next step in helping teach kids coding but also a heavy product.
Pico-8 is a little more like what might be achievable but obviously with adaption for input via the hat (for speedy developmant anyway), also have Voxatron from same developers but would inherit the sdame issues plus requires more resources.
I think the hat might be key as an educational tool, the pokitto is different from the current 'retro game' devices as it has a strong electronics focus (maybe get some competition from the Gamebuino META Adruino shield in near future). Having elecronics replace the 'mimic' images is what i see, kids following instructions on a breadboard to build the crossing then playing with variables in a companion pokitto loader/game to change the breadboards timings; when they get that dive into the code project and maybe even change the pokitto program a little in their own project. Building a simple project but allowing the pokitto to interact with just one part of that, so maybe https://www.amazon.co.uk/dp/B074V461MC/ref=sspa_dk_detail_0?psc=1&pd_rd_i=B074V461MC&pd_rd_wg=FAdFJ&pd_rd_r=C0KJDJ3YX9XNZXCDA2QX&pd_rd_w=mFwXM style kit but the pokitto can set a blink rate of the bulb or the pokitto writes the tune for the speaker to play. all this and what was previously said points to the pokitto needing some sort of mini IDE.
As for curriculum, I am breaking that down for 5-11 year olds at the moment and expect it to be done for September (its additional to all my other stuff including work tasks) but think it is possible to replace some of the repeated elements with device programming. I am testing my ideas with an after hours club, we only covered the basics so far prior to coding like what is/are programming, binary, packages, compiler, interpreter, emulator, simulator, etc (and of course played example games, Arduboy though).
the thoughts look good, nearest program for now is probably the tracker as it uses the pokitto to create something live that was not already written by the programmer, mini scratch/logo is a good idea, a simplified version for younger kids could be a beebot style program (https://www.youtube.com/watch?v=5KT2eBaTF_E, https://www.youtube.com/watch?v=1XxKHHdNEA4) which is basically a maze runner on focused tile sets (i.e. alphabet, street maps, mazes).
P.s. I'm not totally sold by the micro:bit, its great for bulk buying but feels a little too limited in its applications.