It's a really good game, so addictive and entertaining. I would like it to be a little bit more easy and progressive, cuz the difficulty curve seems incredibly hard for only 10 levels (My max number of levels). It would be nice if you turn the upgrades in a way more dynamic upgrades to make the gameplay more satisfying and addictive. Also, a multiplayer vs mode would be a nice catch if it could be in there. This is my opinion and suggests for the game, take them or not it's your decision. But besides everything it's such a nice game!