One of the best tower defence/strategy games ever released. Pros: - Massive roster of feline fighters. - Satisfying progression system via tower/cat/resource upgrades. - Returning to previous levels provide both experience/rewards in the form of bonus abilities. - Constant updates = endless content Cons: - Too many microstransaction ads for free users. Provide opt out option. - Cat Stats/Cost/Value needs to be accessible in one window rather than moving between the Equip, Upgrade & Cat Guide.