Thanks for the quote, and the full feedback! We had a reel of Megumin's explosions on, to give the game that extra Animu-punch. Perhaps for next jam we'll be less derivative, but it was nice to revel in such raw, crimson power.
The two sizes were mostly to fix a small, silly problem with the game. Originally, all the frogs would jump at the same time, which overlapped the audio clips. After spacing out the small ones randomly enough, sometimes the frogs would be actually impossible to hit at the same time. So, big frogs, with their own timing! In hindsight, using something other than raw randomness would've also fixed it, but then we'd be in a world without big frogs which is objectively worse.