Just have seen Iron Ingots recipe, another suggestion - could we have special buildings like blast furnace (or others, like alchemy station to make potions for adventurer kit(kits are mentioned in my other comment)), that will take fuel (like coal), ore, and some money (if it's not a private building) for one procedure, to make an ingot.
Could we have advanced research system (or salesman guidebook, something like that) that openes new recipies for late game, like rookie assasin kit including 2 copper daggers, full leather set + extra leather to make a bag for it, that will also make these early game materials more useful, it also opens great possibilities for vary late game, like elite swordsman set, with iron claymore, armor, pbbly some other stuff. Leather is quite cheap, so there must be some way to make it reinforced for expensive late game kits.
The minion somehow reminds me of Kid Buu from Dragon Ball Z.
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Special resource rates are too low, surviving to 32nd wave gave me 6, and i need 100 to make a single const level up to any upgrade, which will take years to double the base income/kill.
Each boss is giving you the wave they are appearing in divided by 10 as special resources. (So the first boss rewards 1, second 2 and so on). If you are above wave 200 you would receive around ~210 special resources. (This should be possible even without permanent upgrades according to the highscore list.) Since the upgrades are permanent you can reach a higher level sooner or later which is going to speed up the process of gaining special resources. If more people are agree that the price is too high I will increase the amount of special resources dropped by bosses. :)
It would be good to make a new building, like "angels.co" that produces angel investors with separate achievements for getting 25, 50, 100... amount of theese buildings, with a vary high price.
I wasn't able to play this game for 1 week, and i was very surprized when i've seen that i've got 1kk angel investors while i was offline. Can't wait to see rhe update =^__^=
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Thanks for sharing your 2 ideas. I have to see if they can be implemented and how much work it is, but generally I like them.