Jam version, win 10 64 bit
Alright, I tried the 06 version and that worked just fine.
Cool game, looks like you spent quite a lot of time on the RTS type controls and the unit upgrades. I like the sketchy ui.
My strategy generally ended up being just packing the units in as close as possible and then bumrushing. I would have liked to be able to retract my decision on who to upgrade -- at one point I tried to upgrade the soldiers with helmets, armor, and axes, and there was no option so I had no choice but to skip.