Airscape: The Fall of Gravity

Airscape: The Fall of Gravity is a fast-paced, gravity-shifting action platformer about a deep-sea octopus who has been kidnapped by a mechanical alien race.

Control a Dumbo Octopus (Grimpoteuthis abyssicola) on a skybound adventure to save its family from the clutches of the motorized menace.
Jump, dodge, and swim through a breathtaking environment full of floating islands, water formations, and robotic terrors. There's no fighting in Airscape - you'll have to rely on your wits, speed, and reflexes to navigate through the deadly gauntlets.

• 18 devious zones - including 60+ unique levels!
• Tight controls - dodge bullets, outsmart seekers, and avoid mines with ease, optimized for gamepads and keyboards!
• Hardcore difficulty - life as an octopus is tough, but frequent checkpoints and quick respawn times get you back to the action in no time!
• Five playable characters - each with their own unique strengths and weaknesses!
• Swim like an octopus - you'll transition smoothly between running on land and swimming through impossibly suspended water blobs!
• Full Orchestral Soundtrack - Your thumbs may hate you, but your ears will love you!

Source: Steam Store Description