good gameplay update added stuff that needed to be added.

changes:

• add support for different frame rates (note: no UI to change this currently)
• added player heath and o2
• fixed bugs with the recipe menu such as making the hover text the item name and not its class id
• materials now have their chemical composition in their names
• added saving and loading
• added new items and recipes

in this update I tried to focus more on gameplay but I still had to do a lot of backend work to make sure the future of the game is sustainable. overall this was a fun update to make. next I will hopefully add more items and gameplay stuff.