Pretty entertaining tycoon game! The instructions you put in the description made enough sense to figure out what to do. I also really liked the light on the head of the miner. The sound effects for the robots moving wouldn't work for the green or blue bots though. Also, the AI is a bit glitchy, occasionally collecting other ores. It's okay for the theme, but it feels more like AI is helping you, but you're not really helping it (collaborate). I'd love to see some satisfying particle effects when ore is collected too! Going for the satisfying route of collecting ores would have to be the main way to keep players entertained. Unless you add a timer or some kind of pressure/penalty, then there's really no reason not to just use the best bot, go get the ores then hit the top of the screen to refresh. Overall, fun tycoon game, but needs some more satisfaction though to keep players entertained :)