This was an interesting strategy game! I will admit, I'm pretty bad at this type of game, so I couldn't beat the whole game by myself, but I did appreciate how the defeat became part of the cycle. I was going to say that the skeletons felt more powerful than the phalanx, but then I thought of a scenario where the phalanx would be more useful, so it generally felt pretty well balanced. I'm sure you're aware of this and it was due to game jam constraints, but it would have been nice to get a better indicator of the mechanics of each unit within the game, even if it was just the text inside the text box. I think the simple graphics worked in this case, although having slight alterations to the directional triangle for each different unit could be fun.
It's always nice to see games that require strategy, even if I am terrible as them.