Simple Gaming Experience
While this game isn't exactly boring, it isn't exactly entertaining either.
The game is simple, unchallenging and unrewarding.
I got a submarine after a few levels, but it didn't seem to change any of my stats, and the amount of trash and fish didn't seem to raise as I proceeded through levels.
The game is fairly good looking, but the gaming experience was dull.
I would suggest more variations in level surroundings and spawning objects. Something that makes the player feel the process. Maybe even divide the game levels into areas with a specific amount of levels for each area, so players have milestones to reach for, and knows when to expect additional challenge and new visual objects.
Also add a counter for the game levels, so people can keep track of how far they got, without having to keep count themselves.
I have to rate this game below average, because after the game ended and I was rewarded with a score, I didn't feel any drive to try and beat that score, or to max my own potential score. That's the least I expect from a game such as this.