-Press the space bar to summon a new critter -For the first critter you want to fuse, click "q" with your cursor on the critter you want to fuse -For the second critter you want to fuse, click "w" with your cursor on the next critter you want to fuse -Once that is done, you should get your new critter from the two critters you fused! -There are still glitches in the game -press "e" to dump a critter The fusion in the thumbnail is valid