It's a nice game, I woul've liked to swap color by clicking on the color swatches direclty.
I find some cases where I died but without knowing why, maybe some additional feedbacks could help I don't know. Or maybe I missed some points.
The shop was a bit difficult to use when you just try to survive :p
By the way I liked the escalation with the shapes and the patterns that the waves creates. It was very cool and chaotic. When to chaos create some kind of order, it's beautiful :D Nice job!