A decent idea for a game.
Pros: Level design and aesthetic. Having the level move downward so the player must anticipate is pretty neat. Also, music.
Cons: Music. It's a great track, but having it restart at every level reset and new level gets a bit irritating after a while. I also had some trouble getting clicks to register on removable objects. The pointer from the game appears to lag behind the OS pointer.
Suggestions: More levels, obviously. Perhaps a more satisfying incineration of the Creeper. Right now it's kind of bleh. Also include something to indicate the player completed a level. Nothing too overpowering because I like how simplistic the game appears.
The pointer in game could stand to look like a pickaxe :)