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.
Whichever color scheme you choose, make sure it works for colorblind folks too! I'm not colorblind myself, but I know it's a good source of frustration for them.
I don't think that is possible, given how many different colors this generates.
As the colors are purely for aesthetic purposes, this shouldn't be too much of an issue. As long as it is pleasing to the eye for them!
I guess this is true, as long as the colors do appear differently to them.
I don't think the colors are for aesthetic purposes. They describe meaning for how large and fast the objects are.