Interesting take on this game - if anything I feel like its far too often that the fish spawn and I am still on cooldown with an arm making it impossible to even have a chance for them -that being said I don't think there is a failure condition to this game?
I think with a bit more visual story telling (rather then typing it up in the description) would really go a long way here also, and some SFX to sell the story a bit more
Keep it up :)