The sentry tower is a casual game that integrates strategy, construction, tower defense, and gathering. Slow pace and a small amount of operation are the main theme of the game. Spend the least time to do the most things, there are no novice tutorials in the game, free exploration of the game is the greatest joy of playing the game (I don't like the novice tutorials so I didn't do it! My game is selfish! Haha!).