To start of I think it's a great little game in short bursts. Marketing it as a free game is rather deceiving in my opinion. Simply market it as a £2.99 game with an ad or two to get double resources and maybe between each island. Enjoying the game and then being asked to pay £5.99 for progression ruins your experience. After clicking 2/3 times you get told you can watch 20 ads instead, nah. Can feel basic at times, each run is extremely repetitive. Very little variation in all elements.