First of all THANKYOU for buying the game! It is much appreciated as its our only way to pay for food for our cats (who are appreciative in some cat-like low-key way).We currently support buying the game direct from us (through the humble widget seen below), from the steam store, through katridge, GoG and the humble store. We currently have about 88,000 happy players. (and 3 happy cats)

Not sure about buying? we have a bunch of youtube videos which show the latest state of the game, here are two of the recent ones:

We use the humble widget to accept direct sales of the game (you also get a steam key, and we earn the most money from this method):

Also site license for educational establishments:
CLICK HERE to buy a site license for upo to 100 students.