We are certain that this is a kawaii gamesoft.
an expanded commercial version for Switch is due out soon, too
The deluxe commercial version of Raindrop is finally ready to go: it'll offer four play modes, online leaderboards, pixel-perfect and undocked tate support and other refinements over the initial free version. The JP version's ¥1260 with a launch discount, so expect the global version (which may not be day-and-date, but it's already loc'd) to be $10-ish. Are you willing to shell out to play with cat art on either side of the screen?
...but only in Japan, as the global release isn't ready yet, but it has multi-language support so you shouldn't have any trouble playing the JP version. They're also planning a Steam release, by the way.