Thank you so much for playing the game and sharing your constructive feedback! I appreciate your kind words and your suggestions. Some features, like the ability to sell weapons, were left out during the final stretch of development, but we're actively working to implement a selling system and a weapon-combination feature that will allow you to merge weapons for higher rarity and improved stats. We're also currently revamping the wave system to make it more engaging, while introducing new weapons with unique mechanics and additional enemy types to enhance the gameplay experience. Once again, I deeply appreciate your feedback and your time spent playing the game!