Mechanically simple, and often the binding would not work and it reset me back to the start. That said, A+ for level design. Was super fun to navigate.
Oh dang... one more bug I guess :D. For some reason I had some problems with web GL builds. Stuff that worked wonderfully locally would just crash in web GL (I think some references get lost due to function / file renames).
You did hold binding key for the full duration right?