The mechanics at play here sets the groundwork for a lovely experience, a fun aesthetic for a platforming adventure with clever design and even secrets throughout the level composition. 

At times it drags on for a bit. While the scale is impressive, were the scope of this game narrowed to a shorter experience, the elements of its design would be elevated. A tighter design methodology could make this a vertical slice of an intriguing platformer.  

Wow, this is a full game! I really enjoyed my time with this. It feels a lot like something from the  Metroid series.

It could use some music though. It does get very quiet at times.