My only issue with Jet Island isn't the length, I can have hours of fun just blasting all over the place, no my problem is the early-game.

With no upgrades the game feels far different to how it handles with a few power and fuel upgrades and to be honest, it's more fun having to rely on the environment. The "Drone" minibosses are too easy (Just stand on them lol) and you can basically do the tutorial and walk straight into two of them for easy permanent upgrades which right away serves to minimize the whole movement aspect of the game!