I was eager to play this one, as it seem to remind me of my childhood games... too bad the only build available is to Linux and I can't play it... but if you upload a PC Build later, let me know, I'll gladly test it :)
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I don't normally use Windows and when I tried it, the sound wasn't working right (but of course, that's probably just Windows...)
If I have time, I'll give it another go.
BTW, you can play it in a desktop browser (WebGL) at http://www.mlbassoc.com/misc/SpaceClassic_WebGL/)