I love this game, it's cute, the music is actually quite good, and it's pretty fun albeit a bit repetitive. You can see that a lot of work was put in to it, hats off to the creator, this is truly a masterpiece!
Once you finish the kar 98k achievement you unlock the kar beast mode. In this mode the kar 98k can destroy ANYTHING in a single shot (it cannot go through targets though)
This is by far one of my favorite games on Kongregate. I love the gameplay and the graphics go just fine with the style, but I have noticed I lag a slight amount.
I got it in 25 days, (second attempt) the trick is you go up as far as you can with the rockets, then go at a very slow downward slope so you are gaining speed. Once near water, go up again (slowly) then down at a slope once again.
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