Jack N’ Jill DX from Ratalaika Games S.L.
A 2D platformer, controlled by a single button. You are able to play as Jack or Jill and need to get through the level to the other character all while navigating the environmental obstacles, avoiding hazards, collecting coins and temporary power ups, bouncing off walls, and squishing enemies by jumping on them.
It has simple grey-scale monochrome color, pixel artstyle, and a chiptune soundtrack that reminds me of the old NES Games.
It has simple yet fun mini-games that you unlock by completing Worlds but that cost coins to access. You can purchase Hats and different color schemes for your screen using tickets that can only be earned in the mini-games. The game has no narrative at all.
Overall the game is fun. The levels are short and can be completed in about a minute or less. I also enjoyed the variety added by the mini-games and the way that the later worlds become more challenging.