The upgrade system wasn’t useful at all, because I suppose the squad you sent is a random between the purchased upgrades, and the system automatically tries to buy the higher option first. So the best approach is to buy the last upgrade first, so they all are “priest” that you sent in combat.

So I keep my UP keyboard for like 15 minutes and suddenly I beaten the game (I don’t know how, there’s no visible indication of progress).

That said, I really liked the lo-fi graphics. The sound on the other hand, was a little annoying, and didn’t represent what was happening on the screen.