Very cute concept and quite original gameplay. I think this game starts out a bit annoying but once you get how to play it, it's really compelling and you have to spend a lot of time pre-planning as much as executing. (At its core this is a game about modular arithmetic which is pretty cool.) I like that it's secretly a turn-based game (I believe, when you set a firework, the timing is quantized to the second so as long as you press it while the timer says a certain value, it will go off at precisely the right time.)
What annoyed me at first was a) the very long pages of text at the start - that should be cut short (though the story between the levels was charming).
And b) that it was not obvious at first that the fireworks were going to be looping, so I thought I had to press it exactly 4/5 seconds before. (I realize upon re-reading that it says this in the tutorial, but there was just way too much text up front that I missed it, and I actually quit to menu and restarted to read the tutorial again and it didn't show up a second time.) Combining this with the 1-second movement lock made it really frustrating to play the first few levels.
But I enjoyed the rest of the game once I was counting up multiples of each number and trying to figure out my "schedule" for each level - first in my head then on paper once it got too complicated. Very nicely done. I loved the cute growing animation, and the Sydney countdown at the end.
PS. Hello :)