A very nice game. The concept is interesting and thrilling. I managed to finish the whole game and I was quite satisfied after finishing it. However, I could not help noticing the following problems:
1) At the last level when you had to find those runes, I thought they were only on the floor. I almost died looking for the runes on the wall. After I found them all, I didn't know what else to do and since I was short on life, I didn't dare to get out of the car so that ghost wouldn't kill me. In the end, I followed my intuition and went out the gate, where the game ended.
2) The UI design is good at the main game stage, however at the final screen (when you finish the game and "Thanks for playing!" appears, I noticed that the bottom left buttons were very small and a bit invisible).
Otherwise, the game is really cool... The particle system is super nice and it's extraordinarily well done, still I can't admit that it wasn't hard for me to finish the game. But the game is very well done. :)