I love the music! The art is simple but on point too! The controls are responsive as they should in a platformer. Good job on that! The multiple doors gave me a metroidvania vibe which i really like. Maybe you should think about adding a mini map to help people keep track of the rooms. The wall jump is really fun too, I like that you embraced it on the level design.
I would prefer less sliding on the surfaces because it was pretty hard to stay on small edges. Also, the change of mid-air direction got a bit frustrating while exploring the rooms. It helps when you wall jumping continuously but it gets confusing when you try to land on a specific area.
Overall, it's a great submission. Keep working on it!