I use webgl version, mb it have sense
hm, there is a rule after 3rd level: all enemies in the level must be dead, only then u will be able to move to next level. Drop the bomb, get out of frog body, and run away as a ghost, so bomb will kill a frog and blow up a wall.
Oh, exactly, you're right!
I didn't notice that the frog was an enemy because it didn't try to attack me.