I bought it yesterday, here's my verdict.
It's not a rip-off, it's a direct copy. They do credit Mojang by saying the game was inspired by Minecraft, but then proceed to say they got the sounds from freesounds.com and the textures were made by some other guy, which is really a big middle finger to Mojang.
The controls aren't bad, I only dislike the crafting a little bit. That doesn't matter though because you really get used to it. The game in general is actually pretty cool. You should get it before it's taken down. :D