Please take the following as constructive criticism! This game has a lot of flaws, like: lack of enemy variety, no need for strategic variety in getting through levels, experience maxes out too soon, repetitive/uninteresting weapon upgrades. The game is addictive but it could use some improvements.
Same problem as BigAl92785. The game doesn't work, it gets paused and when you unpause the guy just runs to the upper-left. You can't do anything at all!