Energy Charge allows me to increase the number of Bone Collectors past my normal limit. Once the time is up I keep that many collectors and energy per second goes into the negatives. Eventually you can lose all energy and the energy could go into the negatives.
Unless you are gonna use the space under store, You could put the achievements under there, like a little popup...just a small icon of what it is and x2 or whatever. ex: [Lemon Icon] x2 That way...it's not in the way of anything. I dunno just an idea.
As I recall, someone help me if I'm wrong. Exp rolls over to the next level, so if we had a 1000 button, we could wasit at the end of our lvl, hit that 1000 button and be a tons xp into our next level. It would ruin the xp as well.
Hey thanks. Idle Tree was a fun game.