Woohoo! You're awesome, thanks! <3
I just started it - it's actually the first App-Image Application I've ever used on my Manjaro Linux so far, but it runs "like butta"/awesomely so far - I'll post it under here if I find any bugs, hang-ups or weird behavior altogether.
But so far, it's like one of the smoothest experiences I've had. Woohoo! I hope there isn't anything as I play along, but so far it's just as I remember it when first playing it on my Windows PC a couple of years ago.
Only thing missing to create a proper Desktop Launcher, is an Icon for the Launcher - either an *.ico or a *.png with the Game Logo would be cool to include in the Package for Linux since it's a little different to Windows and doesn't show it automatically as the App-Image-Icon (I still had the Windows-ZIP handy and could use the Icon from that one for now - but for other Linux Users, it'd be nice to include it in the Linux-ZIP ^_^).
I don't think you need to worry about that - it's probably got something to do with Linux rather than your build then.
And since the Game's running in Fullscreen for me anyway, I don't care much about the Icon when it's started.
And the Icon for the Desktop Launcher is always manually added for Linux - at least in most cases since creating a Desktop Launcher involves adding an Icon manually on my Cinnamon Desktop UI, that I use with Manjaro.
So, no worries there for you, i.m.h.o. <3