Thank you so much everyone! And if you love it and have not given a steam review, PLEASE do so, because that can absolutely make or break a game in its early timeframe.
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Also version 1.001 is now out. It re-plumbs a huge amount of the mouse handling for the menus, a lot of that dating back to 2010 (no joke). So fingers crossed no more bugs from that. I wound up causing THIS issue (but only for some specific people evidently) by fixing the virtual gamepad support for some OTHER people (using a PS1 controller through magic-box or somesuch). All outlier types of hardware (evidently??), but that's why nobody who was on our staff or in the tester pool giving feedback all day caught it.
Anyhow! Restart steam and hopefully that fixes it. In the meantime, if anyone has anything urgent to tell me over the weekend, I suggest emailing me at chrispark7 at gmail, or PMing me. Josh is going to be keeping an eye out for serious bugs, but otherwise in the main I plan to try to take the weekend completely off for once. My wife and son are very excited about it.