At first sight, I thought the game was just a below-average one with very basic gameplay (just tap to eliminate the enemies using different weapons). But later I found that it actually contains various elements such as solving riddles and leveling up different abilities, which add some flavor to this adventure game.
But I have to say that the controls are not that good. You can only move the character by tapping on a certain block of area on you screen and it really took me some time to get used to that.