The infinity thing at the top is the 'plubotinum generator' it is mentioned in the bit of story at the start that if it is destroyed it will cause a minor annihilation of time/space. I would have also included it into the instructions page but the instructions are already three pages long. and I was hoping it's location in the corner behind walls would help make it somewhat obvious that it needs protecting. ^_^;
I've corrected the scrap disappearing thing, and its uploaded now. In the initial version I had scrap clear it's self if it left the screen to try to reduce lag, as I had bad lag issues with it. This version is running a lot smoother but I forgot to change it until you mentioned it.
I have been wanting to add a grid system of some sort to help with building, but I have no idea how to implement it without bad lag, so yeah, if you happen to have something that works I'd like to see it
Unfortunately I don't think I can improve the art any more
My wrist hurts really badly every time I draw, and I do not know any artists well enough to team up with them without me having to pay them a ton of money first. I'm trying to endure it to make what I can, but general practice is constantly painful.