3 stars: The game is challenging and frustrating in a good way. There is one issue however. There should be some calibration method to adjust for touch screen response delay. Each device will have a different, unique amount of delay and this should be configurable. If this is added, the method for computing delay should be something the user cannot abuse or cheat to make the game easier. Rating 3 out of 5 until this is addressed.
5 stars: Just started but so far I think it's awesome. The tests feel solid and the large amount yo explore is exciting. I haven't paid for anything and I didn't sign up with email or anything. I'm able to make it black background and turn the sound on and off easy. The overall set up is simple and effective. Quite impressed for first impressions.
5 stars: I it amazing. There is no ads RANDOM and it only does good because it will help with you relation. The only problem I have with it is that you don't start off with anything but the color change and you have to work your way up and some people get better in other ways but you can watch an ad to get it but I think you should just start off with every practice on the app.
5 stars: Not sure how the baseline reaction time is set for each level, but it's fun to try and try again till you get it or quit it. Trying again a bit later usually works. Ads are non-intrusive and thankfully you're not forced to watch ads every 3rd or 5th attempt like some other games.
4 stars: Nice game interestin...