Small updates and Linux/Mac

A smaller update for Birch fixing some bugs/designs. I haven't had time for that much gamedev stuff the last month; preparing for my masters thesis defence have taken priority.

I exported the game to Linux and Mac aswell, but I have not been able to test if those versions work (I only have windows). If you are a Mac/Linux user, please comment if those versions worked for you! If not I'm very sorry 😬

Changes:

• New ability for Charcoal Elemental
• New biome background
• Rebalanced some damage/health numbers for units
• New level
• Player healing amount increased