Thanks for trying the game!
For the difficulty, unfortunately we didn't have much time to balance things out, we had a few friends test it and that's about it :( Though once you time the sprint right and know where the various marines are, it gets easier! But I realize people don't really want to spent a lot of time "learning" a jam game, especially when there are so many submissions to try!
Also thanks for praising the animations, we're proud of them!