Wow, this is definitely my favourite jam game so far. Right up my alley : D
At first I thought "Huh, neat little concept, but I guess this will be quite short", and then I saw you introducing the loops which have been heaps of fun. I only made it to loop 3 so far, but I'll try again later to beat all of em : D
I also like that dying in a loop brings you back to the beginning of the loop, and not to the beginning of the entire game.
What I find particularly interesting, and something you really could base a game on is, how the loops introduce certain numbers being more dangerous. Take the 1 being way larger for example. It gives the player more challengers, but when it is time to actually collect the one, it works the opposite way this time, the one being big works in the players favor. I genuinely find that unique.
Stuff I think you could add is a little loop counter.
Perhaps also some sort of balance, because sometimes it can be quite challenging to get the required number, other times it is literally the first number that falls and no challenge at all.
One bug I came across is, that it seemed to load the collision of another map, while displaying the correct map though. So I was hovering in air and stuff as if there was ground.
Overall still very neat game, as I said, my favourite so far : D