Hold down the mouse/touchpad to enlarge the size of the creature; double-click to reduce its size. Press the space key and it will return to normal size (and say something). Use the arrow keys to make the creature go anywhere on the screen you want. To switch the character on the screen, press the 's' key. And lastly, press the '0' key for a special surprise!
Mostly me, also used a little help (like with backpacking the double-click feature from my first project, Cake Collector) from @ottobun. NOTES: -Sometimes getting the double-click function to work efficiently/constantly is a bit hard, just make sure you do it quickly and ON the character. Sometimes it might take a couple tries to actually make it get smaller, and it will usually get smaller very fast if so. -If you press space on an animal and it doesn't make any noise, don't worry: Not all of the creatures included have corresponding noises. -The rabbit's noise may sound a bit weird: In case you were wondering why I had that sound, we have a bunny (that's Otto) and sometimes he makes noises like that when he is disGRUNTled (irritated with us, basically). So I adapted the grunt noise to make it more rabbit-fit... ish.