Looks neat, but I would play with nicer palette. Also the hardness is increasing hyperbolically so after those small red dots appears it's almost impossible to survive.
The color palette was pretty random haha; if you have a better color scheme to recommend, I'd love to see it! And I'm currently trying to find a good balance for size and speed such that the game is very challenging, but not impossible.
and try not to use similar colors after each other.