If you're an intergalactic space miner by trade, there are worse fates than getting stranded on a giant red planet rich with subterranean minerals, danger, and excitement. With nowhere to go but deeper and deeper beneath the planet's surface, Mines of Mars teases you along into its Metroid-style adventure by putting up subtle barriers and giving you a means to overcome them: mining. The balance between gathering, crafting, and exploring is well tuned to draw you in, even if other aspects of navigating the planetscape feel weak by comparison.
Open-ended, world-building sandbox games are spawning at an increasingly rapid pace on iOS of late, with each offering a slightly different twist on Minecraft's addictive mix of exploration, scavenging, building, and crafting. While Terraria builds off of the Minecraft vibe in some interesting and adventurous ways, Junk Jack X copies it a bit too blatantly. Lack of originality aside, that's not entirely a bad thing. Translating many of the familiar-looking gameplay and visual elements to 2D works fairly well, offering moments of fun for patient players with collection obsessions.