About what I say about this game is that the movement of color bombs remind Bombette in Paper Mario, and the concept of puzzle dungeon and change character with numbers also remembers two things:
1- dungeon style seems to be inspired by the game of Zelda Four Swords Adventures.
2- The change of character with numbers, well, I made use of number buttons for selecting characters in another game: https://ofihombre.itch.io/sugar-rush-street-racing