A bare-bones platformer at heart, this game is both fun and really not.
The levels are all built similarly, and the gameplay never extends further than "go here, attack this". It gets incredibly repetitive, with the major saving grace being that you don't have the ability to use all 3 gadget slots right off the bat, giving at least a small sense of difference.

However, the game essentially ends there. Getting 100% in this game requires minimal effort, as the only collectibles are these keys that you often just sort of find along your path - and for majority of the levels, you'll find yourself being able to blast through it, with little upgrades, and still end with everything needed.
There is no more to this game than this.