Very cool! I have a couple of suggestions. The first one is easy ... I liked how with the computer I could activate by clicking on it in addition to E. (or maybe it's possible that I just ran into the computer and it activated?) Anyway, being able to click on the recharger thingy would be a nice addition. The other one was a bigger deal for me though it's probably rare. I do everything with a track pad instead of a mouse, and on my trackpad you can't right click and hold left click at the same time, so I was able to vacuum the ghosts but not actually catch them. So a setting to change the right click to "E" or something would be awesome. Nice work!