After having the received the Ethereum to test the game here my review:
When I started the game my metamask quickly prompted me to connect to the site and my eth balance was now connected to the site balance. I was able to purchase "pixels" on a board for roughly 0.005 per pixel. I was playing with some other testers, it was quite fun to play didn't manage to win anything while playing though and just used up all my 0.1 eth balance.