I had to play 4-5 times before understand how to survive and the goal of it. It was not intuitive and I didn't get how important the combos are. 

But once I get it, I played 5 more rounds in a row! It gets really addictive! 

I impress about how deep the game is and all the mechanics, features, power-ups it has.

I'll comeback to it until I've done the 3 rounds for sure!