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.
Junk Jack finds you exploring a 2D setting made out of blocks that can be destroyed and harvested for their constituent parts, which are then used to build tools (like shovels or pickaxes), home decorations, or equipment to design more complex creations. With no built-in goals besides achievements, it's up to you to create your own objectives.