Sounds like a fun game! From the sounds of it, I think text animations would be the best way to do it. Since with text/emoji objects you can just use "Set position" to move them it might be more straightforward than Leave a Trail.
For Leave a Trail you have to draw the pet and think about what order you're drawing things and take a bit of time to get the features right. And if you want to move the drawing, you also have to clear the screen before you move it and then draw the pet again.
That said, with Leave a Trail drawing you more customisation with your pets whereas with emojis you can only choose from what's available:mouse:
Or another way of doing it is like ToasterRebellion's project with shape symbols:
It takes time but that's another way of doing it and here's the link- https://c.gethopscotch.com/p/xct26c3fo
Anyway that's just a bit of feedback and good luck with your game