Thank you all for the kind comments
I've manage to transfert all the sources and datas to the PC. I have problems with the game intro (one big bug to remove which do not appear when launched on my real Amiga).
It seems that WinUAE is not cycle exact and I experience sprites display bugs which do not appear on a real Amiga.
Not really sure, but crossdev is more efficient for a C64 rather than an Amiga, but it's a subjective comment
Do you know someone who can provide a host for the file ?