Thank you for your feedback! I'm glad you found the concept interesting and enjoyed the chemistry-based puzzles. You're absolutely right about the guided introduction. It's a delicate balance between providing enough guidance and letting players discover things on their own, and this can be challenging for any game designer or chemistry teacher.
My 10-year-old cousin was able to finish the game after I explained the first four quests. While this is a positive sign that the core mechanics are accessible, it also indicates that there's room for more carefully worded tasks. Essentially, the questing part should serve as a tutorial, while the sandbox mode is for those who enjoy a challenge and want to apply their new knowledge.
I'll keep this in mind when considering potential future updates. Thanks again for playing and sharing your thoughts!