The gameplay felt a bit repetitive, and the environment didn't really back up the story. The lack of cursor (not sure if this was just for my computer though)combined with the low framerate made it hard to aim.
However, the graphics were great and I'm sure I would have enjoyed it if my laptop could run it properly (it could only reach 20fps on the lowest graphics settings).
Also, 950mb is a lot for a jam game. You should look into which textures/sounds take up the most space and compress/remove them.