This game looks like a lot of fun and I really like the concept. I was so eager to keep playing, because the little robot is really cute and the whole building and resource gathering mechanic while fencing off enemies looks so promising. Unfortunately I wasn't able to build. Maybe I just didn't know how to place the buildings or it isn't implemented. I could see the blueprint of the building when pressing "b", but I wasn't able to really place it. Also collecting the resources, whether it was from enemies or in the other world. I couldn't spent it somewhere, when I jumped in time it was just gone. Also couldn't use it on upgrade screen when jumping back to the resource world. It was constantly "0" in the upgrade screen.
But I can imagine where this is going and I am a big fan of this idea. Hope you will keep working on that. Good job so far!