Working on the inventory is being a real pain to make from scratch in Unity.

Progress is being made though. This inventory has been in production for a long time but once it is fully polished it will be so much easier to use and not just for Alien Life Lab.

Items can stack up (functioning well),

Items can be dropped (functioning...),

Items will be able to combine (getting to it),

Items will have many unique and cool uses (it's coming ok);