I have one huge complaint. The 'use' interface is far from clear in the game.
When you click the use button it doesn't change the cursor and it makes a noise which might be interpreted for not doing anything.
My advice would be to change the interface of the cursor when the use button is hit so that people know that it does something. And it would also be helpful to highlight items which have been clicked on.
2/5 and not 1/5 only because i was able to finish it despite the shitty controls -- mouse sensativity jacked all the way up and it still won't move you in time in some cases even if you jerk it to the direction right away