This is an alpha demo.

This means it's not final and some parts require further polish, but gives a taste of what the game is like to play, so you can choose whether or not to wishlist it.
It's a simple concept, get the key, go through the door.
It's a 2d action puzzle game, it's a combination of working out how to do certain areas while at the same time avoid being reset by the enemies.
The demo has infinite lives and saves progress.