Could be better
Graphically and feature wise I didn't find this game lacking, however there are two little details that more or less ruined it for me
First of all the worst problem (which mind you is present in every game with the fishy mechanics I ever played) was the fact that there is absolutely no significant visual distinction between the hearts you can eat and the hearts that will eat you which frustrated me beyond any form of written expression.
Second, the characters that pop out obstruct your field of view in a way that is perfectly unnoticeable 90% of the time, but then they come out exactly when you are in that corner and it's pretty much hard to see what you're doing, you should either move them in a place where they won't overlap or make them smaller (preferably both)
Otherwise a fun/addictive game, but it could be better