Hooray! The Humble Voxatron Debut Bundle is now actually a bundle as opposed to a single game!
If you pay over the £2.32 average price for Voxatron, you'll also receive The Binding Of Isaac and Blocks That Matter. Considering that we awarded both games with stonking 8/10 scores in their respective reviews (linked), you'd be mad not to pick them up. Voxatron is also a seriously nifty little game even in its alpha state, since its twenty levels and attractive visuals are supplemented by an intuitive level editor.
Remember that you can specify how much of your money you want to go to the developers and to the two worthy charities.