Impressed with graphics, 5 stars right away there. Movement had little delay after removing finger from key before it stopped which felt bad. Didn't understood what to do so couldn't play it - as a rule of thumb since my attention span is short, i like simple to get into, hard to master games. if i can't get into a game without tutorials explaining to me how to play, it's not my cup of tea. i had to see tutorial on the game page to understand what was what but at that point i had already lost the interest in it.
it would be good if it followed some commonly based game behaviour - for example with stone i tried to throw it at ventilation shaft and break it because that's what i did in deus ex and many other first person games. :) but it didn't worked here. when things don't work as i expect them to work, it breaks my immersion.
Impressive work on graphics and atmosphere though.