I have a latest version of Ubuntu 19.04. I think it's a standard shell's behaviour for path containing spaces.
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O.K., there is an error in you starter script on Linux.
cd ~/.config/itch/apps/make/Pixel Vision 8 Make v0.9.3 Linux
vim/nano Pixel Vision 8 Make
Near the end of this file I added some backslashes:
if [ "$ARCH" == "x86_64" ]; then
./Pixel\ Vision\ 8\ Make.bin.x86_64 $@
./Pixel\ Vision\ 8\ Make.bin.x86 $@