Journey to the 90th Parallel

Rumor has it that there is an entrance to a cave at the intersection of 64° southern latitude and 1° eastern latitude. If you can follow that treacherous cave to its endpoint, you will find the ancient civilization hidden deep within the bowels of the Earth, Agartha.

As the best airship captain around, your goal is to survive the cave's many dangers, make your way to the 90th parallel, and go down in history as the greatest explorer to have ever lived.

In terms of gameplay, the left side is basically Flappy Bird, and the right side is some other sort of dodging game. (It's meant to be a top down view.) One might even say that the two halves represent two parallel worlds viewing angles. 

Getting hit reduces your fuel, and fuel pickups replenish it. Make it to 90° before you run out of fuel to win. Run out of fuel, and you'll crash and burn.

Controls:
J/Z = A = ascend
WASD/Arrow keys = D-Pad = move ship in the top down view

Theme:
The Agartha/Hollow Earth mythos is kinda like a parallel world, and the game's concept is based around latitude parallels.

Credits:
Framework: GBDK2020
SFX: HammerGB
Music: Whatever songs you decide to play in the background
Title and victory screen illustrations: Random images pulled from an image search
Everything else: Me