Symmetry

the blinking levels are annoying and the replay button does not work

resetting the score to 0 is rather annopying for just one misclick on the limited move levels

1. if you hit replay it goes back to finished.
2. the blinking doesn't really work, just catch a screenshot -- not worth making it blink.
3. I'd rather see more of those special squares that change others instead of blinking.

TLDR version of my comment: Really cool in concept but held back by implementation. Suggested tweaks: shorter screen, split timed mode and limited moves mode, maybe remove the blinking altogether. 4/5 because I see promise.

Honestly, cool game, really cool concept, but once level 54 came around... That seems like the concept that the entire game should've been, probably, rather than it being timed. And the blinking... That just didn't fit at all. Sure, I had no trouble with it, but combining a race against time with that... it just feels double. You've been rushing for 69 levels, it adds nothing to have a mechanic that rushes you to solve it before it disappears. Oh, I guess to make people lose before they finish all levels? Just seems unnecessarily frustrating. HOWEVER... Long rant aside... I criticise it a lot because it looks to potentially be a very good game. Would you think of splitting the game into timed mode and limited moves mode instead? Other than that, it'd be nice if the game screen could be less long so it fits on my browser window normally. 4/5 in the hopes of some tweaks.