Kind of reminds me of parenting...
Especially when the parents are trying to find time around their kids' schedules for sleep themselves. I must say though, the last 4 levels are pure evil. It's almost like the color selector is purposefully trying to get you to lose.
But in all seriousness, this is quite a unique game. It actually reminds me of Jenga only instead of rectangular logs, you have colorful blocks that bitch at you if they are pushed just a centimeter away from their resting place. =_= The music is perfect for this game, and I love how clean the graphics are. I'm also glad you didn't force a time limit.