- very cool title screen
- extremely wonky mouse controls due to high sensitivity: maybe add an option to adjust that
- unique take on the theme
- the camera sometimes clipped through the walls, showing other areas
- sometimes it was difficult to see where I could turn to shadow form or not. The text indicator helped, but actual shadows would've been more immersive. (Edit: sorry, didn't see the hint about WebGL)
- the low-poly graphics look great, especially the bottles and bumpy rocks on floor and walls help to make the areas look visually uh... diverse (not just flat surfaces)
Disclaimer: These are just my opinions, so a lot of it is very subjective.