I find it funny that your game also had a mechanic about matching by color or shape, like mine did :)
I didn't have much trouble understanding the instructions, but I do think the yellow halo on the selected food is a bit hard to notice (I only knew it was there after reading the other comments here 😅). Maybe an arrow right below the selected food would make it more clear?
Just played your game and it's indeed pretty funny! Especially since our games are very different despite having this similar core concept. I suppose we got inspiration from different games though (in my case: a boardgame called "Jungle Speed").
Glad to see you found it easy to understand! You're absolutely right about the yellow halo around the selected food. I actually noticed it towards the end of development and... kind of forgot to fix it as I was rushing through the last hours. An arrow would definitely have been a quick and efficient fix!