"The visuals and mechanics of procedural generation and terrain deformation of Minecraft were drawn from Infiniminer. According to Minecraft author Markus Persson, after he discovered Infiniminer, he "decided it was the game he wanted to do". As a result, if one plays Infiniminer, one can note that the visuals of blocky graphics and carving out blocks as a miner are practically identical."

So Minecraft probably is more than an Infiniminer clone.