v 0.10.23

MAJOR CHANGES

• Reorganized Iron age - more buildings is now available after you create an iron because Metal Mechanism requires iron not steel, but Metal Sheet now requires Steel instead of Iron
• New Steel Mining machine - dig faster and can dig 9 fields down
• New Iron Storage - double capacity of the wooden storage

FIXES

• Redone toxic mechanism. Now the toxic doesn't spread endlessly through the level and can be cleaned by the water stream. We believe this is close to final as mechanic.
• Minor updates on tutorial
• Other minor fixes