I think the game got tired of me playing it and stopped spawning dots! This is the score I managed:
It's a good game, simple enough to easily understand and complex enough to keep it interesting. I like that more colors are introduced over time, giving the player both a sense of progress and a gradual increase in difficulty.
The sound and music in game work very well. The sound for UI interaction on the main menu was uncomfortably high pitched for my ears.
Ideally you'd want the how to play information on the game page within the game, rather than a 'button' which tells the player to read the page content instead.
The cursor followed my mouse direction quite well, I was able to catch dots which at first appeared as though they might escape my reach. There was a significant spike in lag whenever I changed my cursor's color alignment (I'm playing it on a Firefox browser if that's relevant to know.)