The game design of this game is amazing, the mechanics work great, the modular level design is great and encourages replayability, the power ups keep you trying again and again to reach deeper depths. Even the little things as the obstacles moving and the speed boost of the bubbles just add to the character this game has. It is the constant stream of decision making: "Do I got for the bubble or the pearl, maybe I have to go back up to get a bubble above me, should I enter this cave or should I dive further down" that really impressed me and kept the game engaging. One issue I had was on max diving deeper, I got stuck in a rock multiple times, but that didn't hinder my overall enjoyment of the game. Great job!