Hm I'm not exactly sure, but I know it's slower than in the youtube video you posted. Is there a way to check the fps in the game? This happens literally all the time with my device, bigger games like these will run a little slower than everyone else's lol (doesn't help that my computer barely has any free space).
And tysm for playing Grass Elemental, I'm so glad you enjoyed! Hopefully the Memory puzzle didn't give you too much trouble.