Altered

Here's an excerpt from Altered's Steam description:

Altered is a meditative puzzle game mixing hard puzzles and a soothing atmosphere.

Explore a mysterious world filled with challenging puzzles solving them by altering your characters in multiple ways, forcing you to think outside the box.

Take your time and solve at your own pace, as you make your way through.

Challenge yourself by solving one of over 80 puzzles, with the twist of altering each character using their unique powers.

By understanding their powers, you will gain new intuition for solving interesting puzzles.

Altered was selected to the Copenhagen Game Collective Yonderplay Showcase at the 2019 Nordic Game Conference.