Poly The Frog: Sucks, terrible mobile port with frustrating levels.
Poly The Frog 2: Island Hopper: Improves almost everything from the first. Fixed controls (except jumping) and a fun setting and level design.
Poly The Frog 3: Billy Bullfrog's Decree: The currently ULTIMATE Polly experience. Settings, saves, checkpoints, powerups, bosses, even more variety in level themes, worlds, and more!
Interested to see what improvements will be made in the next installment or in your next game! :)