Interesting game! Right now, the game is very chill and doesn't have much in the way of challenge or much gameplay. I like the idea of throwing cubes into each section. Think about how other games accomplish this sort of thing. In Spyro 2, there is the level "Idol Springs" with the minigame where you have to shoot the correct coloured fish into the Idol's mouth. Shoot the incorrect one, and the idol gets ill and throws half the fish up! This creates a situation where the player has to manage their own twitch instincts and patience to win. In your game, maybe test with 1 zone and have the colour change with some sort of time limit. Could add to urgency. Or no time limit and no urgency, but then design for different skill checks