The project started as a disc, 128KB only, multiload game. I even sent DSK to several people for testing.
But then it started to grow and I had to make a decision:
1. To keep the disc and the 128KB requirement, and apply severe constrains to the graphics quality.
2. To move the game to a cartridge, making the graphics even better, making the game compatible with 64KB machines and getting rid of multiload.
What tipped the scales was the possibility of adding a secondary AY chip to the cartridge for simultaneous in-game music and sound effects.
Would I say the game is compatible with stock machines? Well, stock machines did support ROM boards, and later models had a cartridge slot. In fact, a disc/128KB version would be compatible with only 2 out of 5 stock models.
The game can be put into a Plus cartridge and played (with no extra sound channels). So we can say it's at least compatible with stock 464+ and 6128+, without discussion.
I think a wide range of users will be able to play the game, even not getting the cartridge, if they have a X-MEM, M4, Dandanator or C4CPC. They can play also in emulators, I managed to run the game even in a FPGA Amstrad and MAME.
All that said, I also understand the point of the super purists that would like a game in the format it would have been back in the day. All I can say about that is this is not my last game, I'll probably make a tape/64kb game at some point.
Greetings,Abalore