Nice background-music (vibes with first generations up to yellow/green-versions that are quite special in its way) & gameplay have bits of "snake" or "pacman" to find next bit for collecting?
I like the designs of poketballs, easy in easteregg-hunting for them but also collission-detection at the sign, trees & that building there. Flowers made it look less "just grassy" as tiled floor underneath.
Funny if secret "headbutt" just some of the trees ...to either have none or one random ball out of it too?