I tested on an old laptop to see what happens (core2duo p7xxx 2GHz, 3Gb, gt9400).
10 first sec 4~6 FPS else 12~17/18FPS but the new controls greatly helps for playing but ambiences'sound are ugly
I recommend you to check if the frame rate is below 20 ---> disable ambiences'sounds (just keep sfx footstep)
Else new controls new controls are really much better (they help the fluidity of gameplay)
Nice job again