Both! :)
it is one folder split in two pieces. (it was too big to upload in one file) Most of the files are in the first one and the second contains one of the levels. So download both zip and extract them into the same folder!
Viewing post in Star Dust Wars - Director's Cut comments
Unfortunately, I cannot provide specific installation instructions for the A500 Mini, as I do not own the device myself.
However, (real or emulated HW) if Workbench is already running on it, the process involves nothing more than copying or extracting the files into a folder and then launching the executable found there.
If it is possible to boot from a specific directory, that could also be a viable approach (assuming the zip file contains the necessary libraries and the startup-sequence).