What worked:
The idea of the low resolution was neat to give the game the feeling of an older game. Having a metered power to deal with the enemies works well.
What didn't:
The implementation of the low resolution needs work. Instead of exporting into a set resolution, you should the camera to view the game in the target resolution, then use a texture to make the game look pixelated. This will allow you to customize things more and cause less problems.
It is very hard to see. I found myself wrestling with shelves more often than the robots.
Some indication of which boxes you're supposed to pick up will help. I finally found the boxes and realized that I was picking up entire shelves of boxes to carry around. I took a while since the "pick-up shelves" look identical to any other shelf, plus I was looking for loose boxes.
Bugs:
None found.
Good job!