One fine day I was just playing around with that single card shown in the above footage and discovered that rotating a packet while its corner inserted in the hole of the card allows me to easily move two packets at once. That changed everything. It was when I knew there was more to it. So I started experimenting.
Another huge influence was without doubt "Squids" by Pocket Park. While I was playing with that card, in some grips the card would bend which seemed inconvenient. Hence, I knew it isn't supposed to be a single card but a "Packet".
You'll learn more about the "Evolution" of Cavities below.