This is amazing, great job. I would have liked a bit more sounds. And perhaps some on screen prompt to tell you that you need the left mouse button to purchase a gun. Really hope you will upgrade this game after the jam ends!

This is quite an achievement! A lot of coding work must have gone into that. I can see a lot of potential for building this out into a full fledged game. The level design is a bit primitive, and it's too bad there a no real NPC's (monsters to shoot) in Crayta yet. A drone-flying game mode in Crayta would also really benefit  this kind of game. But with the limitations you had, this is really good.  I'm thinking it could be fun if the player has to avoid getting caught the monsters, run around and avoid them while building the base.  

Im excited to see how this develops.   Great work!

Phenomenal!