this is just my experience and not the rule .
this game knows exactly what is wants to be . it is fun and addicting. I love that the fish flops and sticks to the sand , the color customization is a nice touch. my favorite is blue and the fact that the player dies when going off the screen is a nice take on the genera. I love that the game remembers your high score ! You packed a lot of the expected features in which is also great. The only thing is that I , for me, the difficulty ramps up to quickly. I would love to play this game for about 2 -3 minutes a round and have a score of about 10 000 , I would feel like a champ, it would also be nice to mix things up a bit by breaking up all the obstacles and power ups into lets say 3 levels of increasing difficulty each 1 minute long, " so I would get my 3 mins , with each level ending with the fish flopping back into the ocean and a seagul taking the fish back to the start , after all no fish were harmed in the making of this game right lol
hope this was helpful.