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Main features are pretty much done. Here are the most important ones:

• Neutrons interact with uranium to release more neutrons
• Control rods absorb neutrons to reduce the rate of the reaction
• Neutron moderators slow down fast neutrons so they can interact with other reactor elements
• Water can absorb neutrons, but neutrons also heat it up, which can cause it to evaporate
• Added sound for neutron-uranium collision
• Added various demo modes which can be selected upon launch.