XSp.

W*H*B is a neat puzzle game by Bob Smith made for ZX Spectrum:

Unfortunately, you’d need a ZX Spectrum emulator to play it.

If you have it, try grabbing the ROM at W*H*B website.
But as blog IndieGames pointed out, the game is like an abandonware version of Damien Clarke’s Bloxorz flash game, which I remember playing sometime ago.

So, if you don’t have a ZX Spectrum emulator, and don’t really mind not having the old school feel, click the image of this link to Albino Black Sheep’s page for Bloxorz!

Source: IndieGames