Cobra Caliber 2: There Can Only Be One More

Cobra Caliber 2: There Can Only Be One More is a sidescrolling game of dodging obstacles and bullets, while you (as the protagonist, Cobra Caliber) jump from the Moon to Earth to Mars, deorbiting among the various layers of orbital defenses and facilities (as mankind now lives in space in orbit around the planets, due to mining out and using up most of the resources), hoping to take out the only other immortal being left in the solar system.

The game is playable in browser, using the cursor keys, WASD or Xbox 360 controller.
Press M to toggle the soundtrack and press N to cycle between songs.
The game is played best at a stable 60 fps, press C while ingame to toggle the planetary curve filter if FPS issues arise.
Known bug: if the game loses focus during the initial load, you are instantly taken to the end credits.
Workaround: refresh the page and keep focus on the game.

We opt out of the art category, as all of the tilesets and sprites used in this game are either licensed or free-to-use assets.

Game source code is available at https://github.com/mikkpr/LD38
The game is hosted at https://mikkpr.github.io/LD38
Our presentation at Ludum Dare 38 Tartu, from the event's Twitch stream https://youtu.be/Hd9x4XMfdQ0 (with full playthrough)