Normally I would give this game five stars, but the update with the timed games ruined it for me. I’m on level 572 and I’ve been playing each level at my own pace because it’s stress-relieving for me. Now that each level is timed with no way to change that option, it makes it stressful to play now. So, I no longer feel connected to this game and I feel I can’t play it now. I’ll check back periodically to see if the timer either gets removed or it becomes optional, otherwise I’m done. Will change my rating to five stars if/when that happens.

Two days ago I opened the game & it would immediately closed! Multiple times. I was on level 2700+ & restarted my phone, nothing worked to access the game. So I re-installed the game.
Now there's a timer on each puzzle. If you don't finish before the timer went to zero, you had to start all over again. Most of the time I could make it thru ok but got one puzzle that stumped me. I hit the hint button but being so close to Zero by the time I watched the obligatory video ad, I had to go back to the beginning of the puzzle. No matter what I did, I was sent back to the beginning. I never got a hint so that I could try to solve the puzzle. I play this because it's a mind game & for me, it's relaxing & fun. Now I have to find another game because the timer ruined the puzzle.

A very simple and fun style of gameplay, but also progressively gets challenging as you go to higher levels. There’s an ad every other level and every other retry level so it isn’t too bad especially for a FREE game and removing ads isn’t too expensive either. I like the timer too since it add to the challenge and creates tension.

One thing I noticed that should be changed (or rather added) is a tutorial for mixing colors (it is very simple but it may not be to everyone) and on the mechanics of the random grey light bulbs. The random grey lightbulbs took me a minute to understand.

All and all a great game!