First, apologies for the major thread necromancy.
I've been doing something similar to the OP, i.e. recreating TurboRaketti, because, well, it's the best game ever :-)
I've taken a slightly different approach, rewriting from scratch in C without reference to the disassembler, and I haven't been quite as obsessive about recreating the detail, but all of the original levels are there (plus some new ones), and the gameplay is as close as I can get.
I've used some of the translations from this thread, so I wanted to say 'Thanks' to all those who contributed to those.
There was also way back in the thread a suggestion that someone might know how to contact Heikki Kosola, the original author, and it seemed polite to at least let him know if possible, so if anyone can help with that, I'd appreciate it.
This might be the point to confess that my game doesn't run on Amiga (I haven't owned one for years) but there are versions for Android, Raspberry Pi, and <cough> windows. It may be possible to port to Amiga without too much effort, if anyone wanted to, as it uses the Allegro library for all the low-level stuff, and I believe there is an Amiga version of that.
Oh yes, it's free, and open source, natch :-)
Cheers,
Ian.
GravStorm for Android here:
https://play.google.com/store/apps/d...storm&hl=en_GB
Gravstorm for Windows / Raspberry Pi / Source here:
https://github.com/IanLewis42/GravStorm
Videos here:
https://www.youtube.com/channel/UC7A...trZUZKs4A4fC1w