So I thought this game was a very cool idea, combing a top-down shooter with a factory building game. I don't think I've ever seen anyone try something like this before. I got to round 9 while I was saving up money to build the pistol parts.
If you wanted to continue working on it (which I suggest you do), I suggest adding a manual or some sort of way to explain to the player what is required to build what. I put down a drill expecting extra money per round, not fully understanding what was needed to do what. I also put down the rifle stamp expecting to build it with just bolts. I also think building items such as health kits and armor would be nice. On top of that, a greater variety of enemies would help too. There also needs to be some other endgame other then 'survive', I suggest getting enough resources to build a rocket or a teleporter to exit the stage. I know all of that may not have been possible to do during the jam, which is why I suggest you keep working on it. I think you have a really good core of an idea that just needs to be expanded upon a little bit more.
I did run into problem where the game displayed all the menus super small on my computer. Also, when walking and placing the mouse bellow the player, the weapon glitches back and forth. Other then that I think the game worked as intended.
Overall fun game, I think you have a solid idea you just need to iterate on a little more.