High on graphics and sound. Story is far-fetched. Huge difference in difficulty between levels and boss (boss much much harder). I feel that with bosses the major cause of me wining/losing was what second attack it will choose as with some attacks I couldn't have chance to dodge them so I was a dead meat right form the start.
The major issue I have encountered is that game became irresponsive (or just got huge fps drop) whenver I unpaused the game and ended the level. It almost made me quit.