The graphics and music are good, but the game-play itself lack any attraction.
The difficulty of a game should increase as the levels pass by, but here it stagnates at an easy to mediocre(at best).
Furthermore, elements are being introduced in some levels, but never appear again (like the lift, set off by a bomb underneath him). This will confuse the player and deter him from continuing.
Also the end reward is not that "rewarding".