Ah, this is delightful - as a life-long collector of old machines, having kept every computer I've used personally/professionally since 1978, the Speccie is one of the greatest ways to spend an afternoon - and even though there are a huge, huge number of other titles, Manic Miner is still a top 5 favorite in the playlist.

The disassembly is particularly nice to read, such as the sprite-drawing routine:

https://skoolkit.ca/disassemblies/manic_miner/asm/36852.html

Curious that there are snippets of the original project source code still embedded in the 'dead' memory space of the Manic Miner binary .. I find myself wondering if this could be the basis of a ML-driven rewrite into the original source form, as a kind of archaic protogenesis .. but, anyway, still a curio:

https://skoolkit.ca/disassemblies/manic_miner/asm/37708.html

Indeed, for anyone with a new or old interest in assembly language, of any competency, this disassembly is a delightful read ..