It is fun, crafting walls took a bit to get right but I was able to figure it out.
only issue is ctr+t and ctr+f for time progression don't work for me because they are bound to the new tab and find on page functions of my browser.
Thanks for the feedback!
Yep, the time progression mapping is a messed up one - most of functional keys are already mapped and Ctrl/Alt ones are also occupied. I probably should have prevented defaults...
For now, these are also mapped to Alt+ and Option/Meta+ - so could work with other modifiers instead of Ctrl. I've omitted that from the description to simplify things.