This game is really interesting! I like that if you place a colored block on the first beat of a measure, you can let it resolve and then if you're quick enough you can probably drag it to the fourth beatto get two hits of it in the same measure. I like the concept a lot I feel like it can be expanded.
I think the only thing holding this game back is this kind of game probably needs an in game guided tutorial to really teach you what's happening, but that's a huge ask on a four day jam for gameplay as different as this. I think it would also probably be good if in addition to the yellow arrow at the bottom you have a line scrolling over where the tempo is currently at.
Great job I love how unique this game is.