You are the Gravity Frog, a might gravity bending superfrog!
Eat the apples and catch the bugs while avoiding spikes to maximime your score.
Hefty bonus for getting all of the collectibles and reaching the end, but beware, death incurs a score penalty...
Z (button 4) to flip gravity, X (button 5) to use tongue.
Update 1: Made the game just a tiny bit easier, the third floor was VERY tough (but doable) if you wanted to get all the apples.