I would say you need to move the weapons and things over the core or at least make it to where we can place them around the core.  I bought a few things but they appeared off screen where I needed to zoom out to see them. They were all stacked on top of each other and the enemies avoided the core to attack the weapons in the corner.

Needs more clarity. I managed to buy a few things, but they didn't seem to do anything but attract the yellow chips (enemies?). There's probably a fun game here, but I had no idea what to do.

Also, would really like the option to turn the flashing off.