For starters people would probly use their mouse to press the buttons
but there is actual a easier way to do things.

If you press the letters below
-----------------------------------------------------------------------------------------------------------------------------------
E or SPACE - use
WASD - movement
R - report
TAB - map
Escape - options
Q - kill ( if you are the imposter of course)
-----------------------------------------------------------------------------------------------------------------------------------
Hope this helped you :D
If you want you can add a reward.