Assault Suit Leynos

Can't even get to the main menu. I bought this because it was dirt cheap and forgot about it for a couple of weeks. Finally got around to trying it out, and while the game launches without issue, there's no way to get from the attract mode to the main menu. I tried literally every key on the keyboard, both quick press and long press, but the only thing I could do is quit to desktop. I checked the discussions and other reviews, and the general consensus was that pressing Z gets to the main menu. Doesn't work on my machine at all, and I tried quitting/restarting several times. Even used a different keyboard just in case that worked for some crazy reason. I don't like reviews that that list only negatives, so in that spirit there are two positive things I can say about Assault Suit Leynos: 1) The attract mode is genuinely pretty cool, and hits all the 16-bit queues. 2) Reading the reviews while looking for a fix turned me on to Gigantic Army, which is an actually functional game that scratches the retro-style, side-scrolling, giant robot game itch. Tried to get a refund just out of principle, but since it had been just over 2 weeks since I'd bought it Steam refused. So instead I'm writing this review. I got this game for like a buck and a quarter, and that was 2 dollars more than it's worth.