I really like the concept of this so far and its a lot of fun. Few issues I noticed that could make it a lot better:
1. After I had access to the generator (I think that's what it is?) my production rate went up really quickly and I had no reason to buy windmills anymore. Maybe scaling the cost slightly each time you buy something would be good so you have more reason to buy both
2. Not sure how it works but I think I reached a cap on how much I could buy at some point? Would be good to have a way of showing this so I know why I can't buy anything else (or maybe this is unintended)
3. I loved the Zeus fight but I couldn't actually beat him. I'm just not fast enough to dodge any of the lightning bolts and I can't kill him fast enough before he kills me
Sorry the feedback isn't more succinct. This looks like a really cool game though so I'm looking forward to seeing the finished version!