The art for the game page and the title screen art with its camera work had me very excited to try this game and I was pretty disappointed.
Waiting for the jetpack meter to fill is not fun. The enemies don't do anything when you collide. the round colliders for the platforms had me sliding off. I don't see the purpose of filling meter when you step on an enemy unless you comboing, but that isn't feasible in the current state of this game.
The lack of a visual showing controls gave me trouble when I started as well.
I hope you'll work more on the core gameplay of your next project over the page and start screen visuals.
Good luck