so when it finished downloading i think it would say

unable to expand "Tropicali_Demo-0.5e-mac.zip" into "downloads". (Error -1 undefined error 0.)

then when doing the extraction it would say 
Could not extract "Tropicali_Demo.app/conents/Resources/autorun/game/images/gloria event 3/Gloria_event3_054.jpg" from the "tropicali_Demo-0.5e-mac.zip" archive: the archive file is incomplete