Fun and addictive game! The physics-based aspect greatly enhances the gameplay experience. There is 'coin farming' involved. But not in a way that degrades the fun. There are some ads (in the non-paid flavor that is) - nothing too annoying. For several reasons, *personally* I rate it higher than its successor HCR2 (consider it the 'lite / vanilla / offline version' of that). If you're not familiar with the genre, a great introduction. Overall: HIGHLY recommended.