You're doing something wrong with addition in the Statistics screen. [using double rather than int?]
For Mission 1 it said I gained 11 xp each from enemies destroyed, gates saved and base integrity and 0 xp from tasks completed. Then it said the total xp was 32.
I always love games like this but compared to the first one it seemed very simple. A steeper learning curve, more levels or simply a harder game would be great.
lvl 73 seems odd. I spent forever trying to do it in acid mode just like the walkthrough said and lost every time. When I switched to sweet mode I got it on my third try.
Good game, my only complaint is that I found it slightly difficult to see my cursor and the turrets bullets. A more visible colour would be greatly appreciated.
I'm pretty sure level 4 is impossible on my macbook. The only light on my keyboard is the caps lock and that doesnt do anything. (If I'm wrong about the solution then nevermind)
I think its pretty good. My only complaint is that scrolling the map is annoying, I should be able to move the map by putting the cursor to the edge of the screen.