I tried out the alpha or beta and I thought it was quite good for the type of game they are trying to make. I assure you they don't even need the Humble Bundle

I tried out the alpha or beta and I thought it was quite good for the type of game they are trying to make. I assure you they don't even need the Humble Bundle money - David has been selling copies for a long time and sold over 100k copies on Steam alone (that is around $3m USD), and I'm pretty sure they sold the majority of their copies off of Steam. His other mini game, Receiver, sold +600k copies on Steam @$5 each, which is another $3m (of course, you have to factor in Steam's ~30 percent cut and taxes, but still....)