In Crystal Mines the player controls a robot via remote control to conduct a mining operation on a newly discovered planet in the year 2265. The robot can use energy balls to dig through dirt and rock as well as defeat enemies. On each level, the player is required to collect a certain number of crystals while avoiding falling rocks and enemies. Once the required amount of crystals have been collected an exit appears somewhere in the level that takes you to the next level.
There are 100 levels. The last 50 levels are similar to the first 50, but are rearranged to be more difficult. Other changes in the last 50 levels can include harder enemies, shorter time limits, more difficult puzzles, fewer bombs, require more crystals to complete, a different location for the exit, and have a different starting place that may put you in immediate danger.