Hi! I just played through your game and I did enjoy it.
Here is a review of some of game aspects with some hints for future improvements.
visual: The visual aspect of game was outstanding. I really loved the mix of pixelated look and nice soft shadows and moody lighting. The effects were done very well, the game looked very professional. If you had more time, I’m sure you would also add a bit more diversity between different sections, as well as more variations to enemies.
audio: Firstly, I really love the fact alone that there is audio in this game. And the sounds are simple, but satisfying. There were no looping cuts to be heard. No ear rape either. I must admit - audio was really well polished and I couldn’t expect any better for a week jam game.
content/story: There was some sort of story. The interaction with environment was minimal, tho. The game was all about shooting zombies, jumping between platforms. Well, except that you had 2 destinations. First - pick up the core, then - return to ship. Although I believe the story aspect could be improved, I yet think the game delivered all the fun needed. The story was simple, but it was there at all, so that’s good already. A bit more content and meaning to the game wouldn’t hurt, though. Also, the game lacked challenge slightly, for which the cause could have been the ability to shoot infinitely. I think that a little cooldown for the gun would have added up for more fun.
controls: The controls were ok. What I found not being so good is that in menu it says options, but once you open them, you can only see the controls without being able to change them. The name of that section was a bit misleading. Of course, the default key config was decent. Being able to turn the character with mouse(either placing cursor on the left side or the right one) would have been great. Also, the character would stay stuck at ledge until I release all buttons when colliding one with side. Some sensors could have been implemented to trigger a climb state, but I assume you didn’t have the time for that. But running and shooting felt smooth enough, it was very pleasant gameplay experience.
I think you got a very amazing game made here. I wish you luck in the contest