From the theme "Growing" it's a nice way to interact with the concept. It was fun to play because I felt that I was playing off time +2.7s but I devise that I could use a blank patch to earn advantage, and I won, but I feel the timer it gives the player after clicking a tile could use some help. The UI could also use some help, like the victory screen instead of the two blank boxes with text, it would be better visually to have it with a border so it doesn't look weird on the screen. As an improvement suggestion regarding the timer, it would be awesome to know if the +2.xxx time it gives me it's based on the timer relative to the rival advance or if it's how much time I've lost unlocking a blacker tile.
In the end, it was a nice game and fun to play.