I know you didn't have much time overall, but this is solid and the game feels very polished.
The most interesting thing in this game to me is how you designed the leaderboard to keep only one top score. It is so unusual and brings so much competitiveness to the game! If I'd had like 10 people to compete with and I am already 3rd or 4th I might called it a day, but this leaderboard doesn't let you go away from the game that easy :D it's all or nothing. Well done!!!