Probably want to put down that "C" opens the inventory in the instructions up there.
Also, I realize this is just starting out, but some crucially needed elements:
- Keybind customization.
- Volume controls.
- A lead-in time at the start of round 1.
- Improved visual feedback (I suspect that's already on your to-do list, though).
I look forward to seeing what you come up with.