What kind of game is this "Mystery Chamber 2015"?

This is my first platformer that I started developing in 2015, but what’s wrong with it and why is it called not just the "Mystery Chamber"?

And here's the thing. This platformer was unfinished and quickly abandoned, since then I was not yet good at game development. However, at the beginning of 2019, the views on the project were revised, and it was decided to start a new project based on the old game, to the name of which I added “2015” to distinguish it from the latest game.

What the new Mystery Chamber will be about will be revealed a bit later, but for now you can familiarize yourself with this old game.

Mystery Chamber 2015

Once Roach invited his friends Jack, Alistair and the Magician to visit. Jack leaned on the wall, when suddenly it opened! It turned out to be a secret passage to the Mystery Chamber, but only one could enter it. Go forward to adventure! And do not forget to take weapons from the Magician.

Link to the game: https://gamejolt.com/games/mystery_chamber_2015/94510