This app was mentioned in 5 comments, with an average of 2.00 upvotes
if you are not afraid of addiction, these games can be more fun than they deserve to be. Neo is newer than DX but their playfeel is different enough to make it worthwhile to get both and see if you prefer one or choose to have two gardens https://play.google.com/store/apps/details?id=jp.co.beeworks.mushroomNEO https://play.google.com/store/apps/details?id=jp.co.beeworks.mushroomDX
Maybe this is too simple, but the Mushroom Garden games are pretty nice.
NEO Mushroom Garden
Mushroom Garden Deluxe
Also, Neko Atsume.
Is this the mushroom game you're referring to?
The most common bacteria kind of games I found are:
NEO Mushroom Garden, Mushroom Garden Prime and Funghi's Den. The developer has more games like this but they're only available in Japanese and Chinese.