Game worked flawlessly on my gaming laptop on Chrome and I had no difficulties solving any of the puzzles or beating the game - well, except some gambling losses :P Wide range of items and interesting enemies and boss battles, yet lacking incentive to go back and beat at 2x difficulty (maybe Kongregate will add badges for this in the future). Very well made in my opinion, hope we'll get to play a sequel soon!
For the hard badge, my recommendations are 1.If you have a connection with 6 squares at the same time, after a while a 7th square will (usually?) appear, this is very helpful because: 2.as the game progresses the squares start moving faster, you need to try and maintain a connection with 1-2 at all times or else you might get disoriented with how quickly you see everything moving, so try to get back into a connection quickly, this is why that extra 7th square proves to be very useful as more squares = more connections. 3.Also as sk0976 commented, I think that zooming in on the game does indeed help, after trying it out I finally got over 18k, so thanks for that tip, but try whatever works best for you. Oh and you may need a huge amount of persistence, I will admit that I probably spent an unhealthy amount of time on this game, so good luck! Give a + if helpful :P