What a horrifying game, what did these frogs ever do to you? The visuals and audio are very good and well optimized, the gameplay leaves something to be desired. You crush frogs by moving up to them and pressing Spacebar, I would move in front of the frog and do this, but you can also do this from the sides as well. One annoying thing is when you kill a frog, you can't freely pass through the corpse, so trying to run upwards or downwards through a frog corpse you just killed feels like wading through molasses.
I managed to kill 57 frogs before I lost, and that was it. Killing the frogs is fun, but eventually it gets repetitive without any more stimulus. Good game, should add more!