As someone who doesn't even really enjoy puzzle games, I thought it was a fun puzzler! Since I don't have a lot of experience with this genre it's hard to comment on the gameplay, except for the fact that I found the challenges well-designed and the gameplay streamlined nicely. The presentation is neat, although some things, like the goal could be more clearly defined. However, there's one thing that greatly hurts both the presentation and the gameplay: the algae/black masses obscure the view. Is it intentional? It led to some frustration whereas there'd be none, and that's a damn shame.
Great job on this game!