Well, I was able to play it and actually progress. I do like it. It's super slow paced but it is fun to build up the resources. However, it did crash a few times.
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I was able to get to a level 3 castle and then I clicked off of the game for a second and it crashed. But other times it did just crash randomly.
It does have a few small usability issues. For example, it took me a bit to figure out that I have to deselect the building tile to be able to click on the training building to make a unit. Also, when you click on a unit that you've made it selects the unit and it also opens up the training menu that you have to close. And then the buttons weren't working so I had to use the hotkeys for each button every time (not sure if that was intentional or not).
Either way, I think it's still fun and has some potential. It does feel a bit buggy, but that's to be expected in a game jam.