I'd like to have a "ROI" measure for each building (for example, how many seconds to repay for itself) - to know which building is the most profitable at the time
Well, Im not bothered by the fact, that miners fully mine up an asteroid and then go to the next nearest. Now i have two miners at the nearest asteroid, and all others charge the enemy base, ignoring all the other asteroids nearby.
Its hard to understand how long the secret code has to be, when you are hopping through levels without exiting to menu. Would it be hard to show the same numbers as in level select screen?
Thanks for your feedback, we'll consider it in a future release. Right now you can see the code lenght by inserting the first code.