The game is lacking a clear goal and therefore a challenge. Maybe the fish patterns should not have been random and endlessly respawning; then you could have had a speedrun to figure out when and where to deploy the bombs for maximum effect, to clear out the pond the fastest. Another approach could have been to keep the randomness but have a limited amount of bombs that only refill when you hit a certain amount of fish. That way you could have a natural loose state for if the player deploys their bombs without strategy. Other than that, good job!