needs a "sell all" button, as well as the ability to select how much you sell at once so that you can free cargo space in order to get the right minerals for each recipe. the upgrades should not be so expensive initially, as it makes the game move too slow. you should be able to stop mining for coal and less valuable ores at your own discretion, because they fill the cargo bay much too fast and arent worth anything later in the game. furthermore, it doesnt make any sense for the upgrades to cost different minerals. they should cost money and maybe some iron, but you have no iron. the game began to lag excessively after i reached about 15km. since there is no drawback in upgrading your equipment, it seems strange that you'd make us unequip and then delete the previous part, instead of just changing it out as soon as the upgrade was purchased??? its nice to see the depth but when i cant access the stores from down there it seems kind of pointless to make the player scroll back and forth, especially when it seems to just be more of the same down there. this game isnt majorly flawed, but it could use a lot of work