I understand that you wanted the game to be simple but here a couple things I think would make this game a little more fun and playable.

1.Sound, some background music and "bite" sound effects would add alot.
2."Events" or "Rewards" some sort of cut scene for a certain score range or reward.
3.Increase the time each time you eat a fish .adds more of a "fun" challenge :D
4. add some sort of "rampage/frenzy" or maybe some "boosts"

add all of those up above and I would give this at least a 4/5 for a simple game. I hope that you take note of this constructive review because I would love to see a improved version of this game.

-Orange55

Sometimes simple games are very fun. Unfortunately, this game is not one of them. Better controls and some sort of reward would go a long way.

Not the worst thing I have ever played but boring, plain ,simple and uninspired. No reward or risk, no reason to play or keep playing

It seems that the problem mentionet above was fixed, but the game is as bad as it were.

When you cannot press two directions at once to achieve diagonal movement...you are playing a bad game.