The explosion zoom was one of the first things that was worked on. We weren't sure how fun the core game was, so to convince us to work on it more there was some time spent getting the zoom and pop-pop right. Afterwards, it felt a lot more rewarding to work on the game.
The game design sort of painted itself in to a wall early, in regards to Frogs and having more enemies. When your only action is immediate victory or defeat, the actual amount of enemies can't really make a difference. Maybe with more brain-time, we could come up with more meaningful enemy groupings.
Thanks for playing, and for leaving a detailed review!