I'm seriously impressed with what you've done here. As it is I'll probably get several hours of gameplay, and it's going to the top of my list for games to show off to friends on my Rift.
Things I love:
- Well-modeled arms help immensely with immersion
- Automatically detecting my playspace from the Guardian System
- Super smooth performance
- Doesn't feel like I'm playing in my little office space
Possible improvements I noticed, many of which you're likely already aware of:
- Oculus Touch controllers let you model much more complex hand motions, like pointing and sticking your thumb out. Implementing that hand modeling to the fullest really helps with immersion
- There needs to be a pause menu of some kind. The first time I opened challenge mode something never loaded and I couldn't press the button to open the door. The only way to fix this was to quit the game completely, since I couldn't pause and restart or quit to the main menu
- As others have mentioned, explaining the way the HUD elements and holsters work would go a long way to improving the initial experience. Also explaining the different types of enemies
- I don't think the default guns should automatically retreat, or not so fast. It's really annoying trying to shoot someone as the gun slides away. Maybe detecting when the index finger is still on the trigger could work when using Touch Controllers if you want it to be automatic
- A graphics menu would be nice, if only to turn on supersampling. Without a menu in-game I'll have to use Oculus Tray Tool to adjust it manually.
- Don't drop guns behind bars, or not so far that I can't reach through. It pulled me out of the game when I leaned forward to grab a gun just out of reach and had the guardian system pop up to warn me I was at the edge of my playspace