Simple concept like a lot of people have mentioned, but I see you threw in some ways to spice it up with bombs which is a really nice thing and often missing in game jams. I think some people have mentioned, that it is not easy to distinguish bombs from frogs when you're just thrown into the game. For that I'd suggest using some colors/symbols that are commonly used for dangers and power ups. (Like for example in platformers spikes instantly signal that they're dangerous and hearts usually are good, so players recognize them straight away). Besides that I really like that you give oportunity to configure lifes and bombs, I think it's a neat little trick to set difficulty. Another good thing is that the screen isn't cluttered and it's easy to see the action. That might get hard when you make bigger games, but I think it's a nice thing to keep in mind when making them. All in all simple, yet neat polished game.