I just wanted to note for those who have not played WoC yet:  That the boss battles this game has are amazing and are far better than any XBLA game thus far. I would honestly give most of the boss battles a 9/10 to 10/10 rating, I mean they are phenomenal. It is obvious that Nathan Fouts knows how to make a game game better, perhaps it's not surprising that the Boss fights are so good when you consider (or are aware) that Mr. Fouts has worked in the video game industry for years and has worked on a lot of critically acclaimed games - checkout his expertise page, right here: http://www.mommysbestgames.com/expertise.html
Nathan Fouts worked specifically on the boss battles for the Playstation 3 game Ratchet and Clank: Tools of Destruction(which is a game that has received consistently good ratings)

So in short Weapon of Choice is one of the few (possibly the only) professionally made XNA Community Games currently available, and for $5 it's soooooooo worth it!!! So if your tired of wasting your money on crappy games(?) then make sure to check out Weapon of Choice today.

I don't get this game. First it's too hard for me. I have six operatives now so I can get a bit further but still I have no clue what I'm supposed to do. Is there any way to make it through the game if you're in the desert? In the level before that I had absolutely no idea where I was supposed to go. There is this huge bug on the right side of the screen but its sole purpose seems to be to make it harder to jump upwards. If I do get there I can't continue, the only way I could figure out was to jump down. I ended up in the desert, killed the sun and died afterwards without knowing why or how.

Are there dead ends in the game? Cause there are obviously different storylines depending on where you go in the first level.

 If you fall on that level than you go to the Desert, If you defeat The Sun boss than you get a secret ending (this level is somewhat hidden - I mean if you don't fall to your death than you won't find it - I found the Desert to be a pretty clever and amusing extra).

The closest thing to a dead end is the Desert And that's not really a dead end as it has an ending.
There are in addition to multiple paths, also multiple endings which all give insight into the Weapon of Choice storyline. I think the bug that you are referring to is more like a gigantic caterpillar that travels repeatedly up - easiest method is to first: drop closer to the bottom of it. Second: wait for an open space in between its head end and it's quantum singularity end(err uh... rear end). lastly: rocket across or use that floating walk ( if you've unlocked that operative? )