Hey dev, my upgrade tree seems to work sometimes but not always and I think your nodes are connecting to the wrong nodes, maybe a code error?

Also, the connection lines dont always show up, just sometimes. 

 Otherwise, really fun game!

Thanks for letting me know! I see the issue, Im working on a fix :)

Ok! Issue should be sorted now!

Basically, what was happening was when I draw lines between nodes to connect them, there is a certain distance. What I failed to consider is that this distance changes based on what resolution you play at. So, I changed the way the distance is measured and did a few rounds of testing. I think it should be all good!