First of all: The music, graphics and gameplay fit perfectly together and create a really chill game. But i have some feedback how you could improve it:
1. The camera makes me feel dizzy, it is very confusing and sometimes i couldn't even see the ball because of it. Also, MAKE THE BALL MORE VISIBLE. Make it bigger and give it a different color.
2. I know you wanted to use the limitation, but the clock unfortanetly doesn't really fit the rest of the game. Maybe make the time a bit longer.
3. Choose a different font. Makes the looks of your game 1000 times better and is really easy to implement.
4. Lower the difficulty. I know, it's hard to make a game that is easy enough, but than i could play through it. Also, you probably didn't have time to fix softlocks and things like that, but rather do that then building a huge map. People like it better if they have 1 minute of fun than 20 minutes full of bugs.
5. And finally: I think a lot more people would play this game if it had a better cover. Maybe just make a new Unity scene and take a few assets and a nice font and make it into a cover which makes people wanna play the game.
I hope my feedback helped you, it would be really cool if you could check out my submission too. :)