Hello, I have found this game again after long time and I enjoyed it very much! Unfortunately I have some downsides listed below. Anyway, congratulations to have such a great idea of the game! I like those new mechanics introduced here.
First, you can have resources below 0. That is making no challenge.
Second, to find out how to start is quite challenging (if you want not to drop below zero).
Also tech points are not used anywhere. I would suggest to use them in a late-game, for example to force some bonuses to the land in the next sandstorm.
Unfortunately there is no challenge in defending yourself. No need to build towers and barracks (except few border cases). No animals, nor other types of enemies there.
And the last thing is save/load + restart/regenerate map. That would make the game more useful. :)