A tried-and-true relaxing game concept.
I think with the idea of a cell going through mitosis is fun, you could possibly lean into it more by having the background be a petri dish. That way you can have the walls of the dish be the walls of the playable area. Right now with the infinitely repeating background you just run into an invisible wall which is a little sub-optimal. This could also help with the endgame because once you fill the petri dish you win.
The movement was very fast which I appreciate, but the collection zone was a little big. It was pretty much if you saw the dot on the screen and it was collectable it got collected.
There was no danger, which if you're going for a hyper-relaxing game that's fine. Typically, what I've seen for this genre, however, is that if you run into something bigger than you it consumes you instead of you consuming it.
Thanks for submitting :)