The look is nice. The idea is interesting. But sadly it's a pay to win game. The battle system is very simple (for example: no target priorities). For a few cards the upgrade system works well. For other ones it doesn't (for example: slow down rate: 20% -> 21%). Also there are a lot of useless cards. I played the game for some time and it is very frustrating to wait for good loot. Sure, one can play simple stages 100 times in a row, but thats not what what i understeand by having fun. The difficult stages are beyond challanging. Its always the same problem: You have money but no space left to build and your towers are too shitty. Not worth wasting your time.