Turns out to be an interesting game, all the graphics are indeed handled via ASM calls. As well as the keyboard controls another ASM call.
Sound as well, about 80% of this thing is ASM handled!
So converting this code straight to QB64 would be an absurd task. Would definitely be easier to just clone the game. Though I still haven't quite figured how most of the graphics are stored, the explosion gfx is stored in the IMX file, its a 1bpp graphic(screen 2 as I suspected, though how exactly its loaded in screen 7 not sure ASM trickery?) but I haven't been able to find the other objects. but they should all be in the IMX file.