I loved the concept and the art! autobattler RPGs are always good fun, especially if you add gear as purchase options :)
I do however have to agree with one of the comments below - I don't think it earns you anything to be able to buy just once per round. I think it would be nice if I could just try spending all my money (and if I could earn more of it from the start) at once and see how a small army of simple dudes fares against initial levels, and also the speed may need a bit of a tweak. I think this latter point is mostly just because of the context of a jam. In a real game with well balanced values and a good default speed you could do without a speed up button
in any case, I enjoyed playing this and I would definitely play a full version