I played this for over half and hour and could not find a key for the first section. I might just be bad. It could potentially be a bug though, as I noticed certain objects were not reset after respawning. I will have to try again with a fresh restart.
Anyway, I liked your UI presentation and the controls felt very smooth. I think this could benefit from the enemy appearing less frequently, and being more aggressive when it does so. Atmosphere is cool, and you did capture the foggy outdoor maze vibe.