Nice job with the new controls, I really enjoyed it more this time! Funnily enough I feel like it needs to become more difficult now. But I would leave that to another level or the extra complexity you had in mind when creating it at the start. One thing that can be good to consider when making a game with economies is the choices you give your player. He has to have meaningfull choices. Right now the best bet is always to try and get the gold one. Maybe if you added different effects, like slowing down the growth without dealing a lot of damage, the player would have to be more strategic while playing. Just a thought!