What I do not like about the game - is uses Unity even through there are no 3D elements. It's excludes me as a Linux user from the game (I saw my friend playing the game with his computer). So 1 star from me - for doing something that was not really necessary.
The game is way to slow, even if you click the "fast" button it takes ages. Plus, we have to press space all the time instead of just switching the option.