It's a decent game. I liked how switching to the correct color requires you to not only consider which color to select, but also which color you are already on to decide which direction to press. It's small but actually has a large effect, especially when things get fast.
A few criticisms:
- I feel that the blue and green colors should both be more saturated, just to distinguish them more. Somebody else suggested a color picker, which would honestly be ideal.
- Sometimes the color triangle turning takes too much time, so I'll lose before it turns fully. This is especially frustrating when things get fast. Simply changing it so the hitboxes turn instantly and not with the animation would fix this.
- Finally, simply adding a score counter would give the player something to work towards, and to compare against. It would make the game a lot more aimless, and probably make it more engaging. The best part is it's super simple to make too.